# Co–Ti system

> Co–Ti system: 246 accepted literature values (invariant reaction 121, phase transition 62, phase equilibrium 29, formation 24) and 6 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/CO-TI.html · Markdown: https://data.orchid-project.org/systems/CO-TI.md

246 accepted literature values from 5 paper(s) (experimental 130, model 96, unspecified 20); 6 calculated phase diagram(s). 29 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: [JSON](https://data.orchid-project.org/literature/systems/CO-TI.json) · [CSV](https://data.orchid-project.org/systems/CO-TI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CO-TI) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#CO-TI/CoTi-00Cac.json) · [phases (9)](https://data.orchid-project.org/phases/pages/CO-TI.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CO-TI.html) · [Markdown](https://data.orchid-project.org/systems/CO-TI.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 130 |
| model | 96 |
| unspecified | 20 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 121 |
| phase transition | 62 |
| phase equilibrium | 29 |
| formation | 24 |
| mixing / partial | 2 |
| crystal structure | 8 |

## Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| CoTi-00Cac.tdb | G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000). [doi:10.1016/S0966-9795(99)00098-9](https://doi.org/10.1016/S0966-9795%2899%2900098-9) | `6fb1ebbac943b8ac5c4dcb1d4488dd0d30aa697cc6bbcbb24510f39d0b3d601a` | [viewer](https://orchid-project.org/phase-diagrams/#CO-TI/CoTi-00Cac.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoTi-00Cac.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoTi-00Cac.json) |
| CoTi-01Dav-LB.tdb | A.V. Davydov, U.R. Kattner, D. Josell, J.E. Blendell, R.M. Waterstrat, A.J. Shapiro, W.J. Boettinger, Metall. Mater. Trans. A, 32A, 2175-86(2001). [doi:10.1007/s11661-001-0193-8](https://doi.org/10.1007/s11661-001-0193-8) | `b8589e70960bb0536f312ac559d8050bf9903bf086f54899ec00bd2f7ead4f96` | [viewer](https://orchid-project.org/phase-diagrams/#CO-TI/CoTi-01Dav-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoTi-01Dav-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoTi-01Dav-LB.json) |
| CoTi-18Zho.tdb | C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018). [doi:10.1016/j.calphad.2018.08.011](https://doi.org/10.1016/j.calphad.2018.08.011) | `647d0f8bf6e642c136196098e2ed8d70b3006822f8fb8b5801715c81f5b7c39a` | [viewer](https://orchid-project.org/phase-diagrams/#CO-TI/CoTi-18Zho.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoTi-18Zho.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoTi-18Zho.json) |
| CoTi-20Wu.tdb | L. Wu, Y. Zeng, Y. Pan, Y. Du, Y. Peng, H. Li, S. Liu, L. Zhang, L. Liu, J. Chem. Thermodyn., 142, 105995(2020). [doi:10.1016/j.jct.2019.105995](https://doi.org/10.1016/j.jct.2019.105995) | `c8f2189ee1f4e5d7b0382210e6560ef3445239a697343d6adba9e56c97e8d909` | [viewer](https://orchid-project.org/phase-diagrams/#CO-TI/CoTi-20Wu.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoTi-20Wu.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoTi-20Wu.json) |
| CoTi-22Yan.tdb | H. Yang, C. Zhou, H. Wang, B. Yang, J. Iron Steel Res. Int., 29, 914-24(2022). [doi:10.1007/s42243-021-00736-6](https://doi.org/10.1007/s42243-021-00736-6) | `18ac015ba2b74def3a35755c0e7e0be6f2be897fe5ec0f5a8e87b0201c723900` | [viewer](https://orchid-project.org/phase-diagrams/#CO-TI/CoTi-22Yan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoTi-22Yan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoTi-22Yan.json) |
| CoTi-24Tur.tdb | M. Turchanin, P. Agraval, A. Vodopyanova, L. Dreval, J. Phase Equilib. Diffus., 45, 434-46(2024). [doi:10.1007/s11669-024-01094-y](https://doi.org/10.1007/s11669-024-01094-y) | `8e8ceb6778fdc32a527cd6d7deeecda5af19d85baf8093eaf18f3bf9e316865d` | [viewer](https://orchid-project.org/phase-diagrams/#CO-TI/CoTi-24Tur.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/CoTi-24Tur.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/CoTi-24Tur.json) |

Table: Calculated three-phase invariants (model, mole fraction of the second component)

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| CoTi-00Cac.tdb | 1492.12 | LIQUID (x(Ti) 0.29841) + C15_LAVES (x(Ti) 0.32456) + B2_BCC (x(Ti) 0.41482) |
| CoTi-00Cac.tdb | 1483.52 | LIQUID (x(Ti) 0.28129) + C36_LAVES (x(Ti) 0.31368) + C15_LAVES (x(Ti) 0.32127) |
| CoTi-00Cac.tdb | 1470.95 | FCC_A1#2 (x(Ti) 0.1329) + FCC_A1 (x(Ti) 0.13702) + LIQUID (x(Ti) 0.21226) |
| CoTi-00Cac.tdb | 1470.95 | L12_FCC (x(Ti) 0.1329) + FCC_A1 (x(Ti) 0.13702) + LIQUID (x(Ti) 0.21226) |
| CoTi-00Cac.tdb | 1455.8 | FCC_A1 (x(Ti) 0.14354) + L12_FCC (x(Ti) 0.20989) + LIQUID (x(Ti) 0.22014) |
| CoTi-00Cac.tdb | 1453.62 | L12_FCC (x(Ti) 0.23115) + LIQUID (x(Ti) 0.23762) + C36_LAVES (x(Ti) 0.2935) |
| CoTi-00Cac.tdb | 1413.66 | FCC_A1 (x(Ti) 0.13253) + FCC_A1#2 (x(Ti) 0.13737) + L12_FCC (x(Ti) 0.20556) |
| CoTi-00Cac.tdb | 1413.66 | L12_FCC#2 (x(Ti) 0.13253) + FCC_A1 (x(Ti) 0.13737) + L12_FCC (x(Ti) 0.20556) |
| CoTi-00Cac.tdb | 1324.6 | B2_BCC (x(Ti) 0.52436) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.73414) |
| CoTi-00Cac.tdb | 1285.84 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.76791) + B2_BCC (x(Ti) 0.8803) |
| CoTi-00Cac.tdb | 945.84 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.92923) + HCP_A3 (x(Ti) 0.98681) |
| CoTi-00Cac.tdb | 694.99 | HCP_A3 (x(Ti) 0) + FCC_A1 (x(Ti) 0) + L12_FCC (x(Ti) 0) |
| CoTi-00Cac.tdb | 593.41 | HCP_A3 (x(Ti) 3.000e-5) + FCC_A1 (x(Ti) 0.01015) + L12_FCC (x(Ti) 0.24721) |
| CoTi-00Cac.tdb | 593.41 | HCP_A3 (x(Ti) 3.000e-5) + L12_FCC (x(Ti) 0.01015) + L12_FCC#2 (x(Ti) 0.24721) |
| CoTi-00Cac.tdb | 589.33 | L12_FCC (x(Ti) 0.24995) + C36_LAVES (x(Ti) 0.31737) + C15_LAVES (x(Ti) 0.33327) |
| CoTi-01Dav-LB.tdb | 1509.3 | LIQUID (x(Ti) 0.28448) + C15_LAVES (x(Ti) 0.32591) + B2_BCC (x(Ti) 0.42946) |
| CoTi-01Dav-LB.tdb | 1509.3 | LIQUID (x(Ti) 0.28448) + C15_LAVES (x(Ti) 0.32591) + B2_BCC (x(Ti) 0.42946) |
| CoTi-01Dav-LB.tdb | 1474.68 | LIQUID (x(Ti) 0.25209) + C36_LAVES (x(Ti) 0.30945) + C15_LAVES (x(Ti) 0.32007) |
| CoTi-01Dav-LB.tdb | 1460.56 | LIQUID (x(Ti) 0.24032) + L12_FCC (x(Ti) 0.24222) + C36_LAVES (x(Ti) 0.30413) |
| CoTi-01Dav-LB.tdb | 1458.33 | FCC_A1 (x(Ti) 0.15242) + L12_FCC (x(Ti) 0.19384) + LIQUID (x(Ti) 0.20005) |
| CoTi-01Dav-LB.tdb | 1458.33 | L12_FCC#2 (x(Ti) 0.15242) + L12_FCC (x(Ti) 0.19384) + LIQUID (x(Ti) 0.20005) |
| CoTi-01Dav-LB.tdb | 1333.02 | B2_BCC (x(Ti) 0.52326) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.76195) |
| CoTi-01Dav-LB.tdb | 1333.02 | B2_BCC (x(Ti) 0.52326) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.76195) |
| CoTi-01Dav-LB.tdb | 1292.6 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.78651) + B2_BCC (x(Ti) 0.85464) |
| CoTi-01Dav-LB.tdb | 1292.6 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.78656) + B2_BCC (x(Ti) 0.8547) |
| CoTi-01Dav-LB.tdb | 958.96 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.93023) + HCP_A3 (x(Ti) 0.98059) |
| CoTi-01Dav-LB.tdb | 958.96 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.93032) + HCP_A3 (x(Ti) 0.98062) |
| CoTi-01Dav-LB.tdb | 694.99 | HCP_A3 (x(Ti) 0) + FCC_A1 (x(Ti) 0) + L12_FCC (x(Ti) 0) |
| CoTi-01Dav-LB.tdb | 674.51 | L12_FCC (x(Ti) 0.24998) + C36_LAVES (x(Ti) 0.32228) + C15_LAVES (x(Ti) 0.33306) |
| CoTi-01Dav-LB.tdb | 668.99 | L12_FCC (x(Ti) 0.24998) + C15_LAVES (x(Ti) 0.33309) + B2_BCC (x(Ti) 0.49299) |
| CoTi-01Dav-LB.tdb | 668.99 | L12_FCC (x(Ti) 0.24998) + C15_LAVES (x(Ti) 0.33309) + B2_BCC (x(Ti) 0.49299) |
| CoTi-01Dav-LB.tdb | 652.65 | HCP_A3 (x(Ti) 1.900e-4) + FCC_A1 (x(Ti) 0.00471) + L12_FCC (x(Ti) 0.24951) |
| CoTi-01Dav-LB.tdb | 652.65 | HCP_A3 (x(Ti) 1.900e-4) + L12_FCC (x(Ti) 0.00471) + L12_FCC#2 (x(Ti) 0.24951) |
| CoTi-18Zho.tdb | 1507.01 | LIQUID (x(Ti) 0.28352) + C15_LAVES (x(Ti) 0.32578) + B2_BCC (x(Ti) 0.42852) |
| CoTi-18Zho.tdb | 1507.01 | LIQUID (x(Ti) 0.28352) + C15_LAVES (x(Ti) 0.32578) + B2_BCC (x(Ti) 0.42852) |
| CoTi-18Zho.tdb | 1474.7 | LIQUID (x(Ti) 0.2521) + C36_LAVES (x(Ti) 0.30945) + C15_LAVES (x(Ti) 0.32007) |
| CoTi-18Zho.tdb | 1460.43 | LIQUID (x(Ti) 0.23959) + L12_FCC (x(Ti) 0.24164) + C36_LAVES (x(Ti) 0.30368) |
| CoTi-18Zho.tdb | 1458.34 | FCC_A1 (x(Ti) 0.15242) + L12_FCC (x(Ti) 0.19384) + LIQUID (x(Ti) 0.20004) |
| CoTi-18Zho.tdb | 1334.09 | B2_BCC (x(Ti) 0.52254) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.76121) |
| CoTi-18Zho.tdb | 1334.09 | B2_BCC (x(Ti) 0.52254) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.76121) |
| CoTi-18Zho.tdb | 1292.6 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.78651) + B2_BCC (x(Ti) 0.85464) |
| CoTi-18Zho.tdb | 1292.6 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.78656) + B2_BCC (x(Ti) 0.8547) |
| CoTi-18Zho.tdb | 958.96 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.93032) + HCP_A3 (x(Ti) 0.98062) |
| CoTi-18Zho.tdb | 663.32 | HCP_A3 (x(Ti) 1.500e-4) + FCC_A1 (x(Ti) 0.00352) + L12_FCC (x(Ti) 0.24964) |
| CoTi-18Zho.tdb | 638.32 | L12_FCC (x(Ti) 0.25) + C36_LAVES (x(Ti) 0.32272) + C15_LAVES (x(Ti) 0.33325) |
| CoTi-18Zho.tdb | 602.07 | L12_FCC (x(Ti) 0.25) + C15_LAVES (x(Ti) 0.3333) + B2_BCC (x(Ti) 0.49568) |
| CoTi-18Zho.tdb | 602.07 | L12_FCC (x(Ti) 0.25) + C15_LAVES (x(Ti) 0.3333) + B2_BCC (x(Ti) 0.49568) |
| CoTi-20Wu.tdb | 1505.89 | LIQUID (x(Ti) 0.28626) + C15_LAVES (x(Ti) 0.32623) + B2_BCC (x(Ti) 0.4321) |
| CoTi-20Wu.tdb | 1473.2 | LIQUID (x(Ti) 0.25047) + C36_LAVES (x(Ti) 0.30922) + C15_LAVES (x(Ti) 0.31983) |
| CoTi-20Wu.tdb | 1442.68 | FCC_A1 (x(Ti) 0.15156) + L12_FCC (x(Ti) 0.19252) + LIQUID (x(Ti) 0.20587) |
| CoTi-20Wu.tdb | 1442.68 | L12_FCC#2 (x(Ti) 0.15156) + L12_FCC (x(Ti) 0.19252) + LIQUID (x(Ti) 0.20587) |
| CoTi-20Wu.tdb | 1439.81 | L12_FCC (x(Ti) 0.21799) + LIQUID (x(Ti) 0.22134) + C36_LAVES (x(Ti) 0.29442) |
| CoTi-20Wu.tdb | 1333.5 | B2_BCC (x(Ti) 0.52131) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.75903) |
| CoTi-20Wu.tdb | 1282.88 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.78938) + B2_BCC (x(Ti) 0.85943) |
| CoTi-20Wu.tdb | 1282.88 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.78943) + B2_BCC (x(Ti) 0.85948) |
| CoTi-20Wu.tdb | 961.64 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.93112) + HCP_A3 (x(Ti) 0.98092) |
| CoTi-20Wu.tdb | 961.64 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.93113) + HCP_A3 (x(Ti) 0.98092) |
| CoTi-20Wu.tdb | 762.02 | L12_FCC (x(Ti) 0.24998) + C36_LAVES (x(Ti) 0.32187) + C15_LAVES (x(Ti) 0.3328) |
| CoTi-20Wu.tdb | 673.65 | HCP_A3 (x(Ti) 6.000e-5) + FCC_A1 (x(Ti) 0.00232) + L12_FCC (x(Ti) 0.24981) |
| CoTi-20Wu.tdb | 673.65 | HCP_A3 (x(Ti) 6.000e-5) + L12_FCC#2 (x(Ti) 0.00232) + L12_FCC (x(Ti) 0.24981) |
| CoTi-20Wu.tdb | 378.69 | L12_FCC (x(Ti) 0.25) + C15_LAVES (x(Ti) 0.33333) + B2_BCC (x(Ti) 0.5) |
| CoTi-22Yan.tdb | 1524.39 | LIQUID (x(Ti) 0.30204) + C15_LAVES (x(Ti) 0.34062) + B2_BCC (x(Ti) 0.43474) |
| CoTi-22Yan.tdb | 1494.68 | LIQUID (x(Ti) 0.27052) + C36_LAVES (x(Ti) 0.32593) + C15_LAVES (x(Ti) 0.33429) |
| CoTi-22Yan.tdb | 1432.94 | FCC_A1 (x(Ti) 0.15423) + L12_FCC (x(Ti) 0.19315) + LIQUID (x(Ti) 0.20334) |
| CoTi-22Yan.tdb | 1430.95 | L12_FCC (x(Ti) 0.22341) + LIQUID (x(Ti) 0.22398) + C36_LAVES (x(Ti) 0.31449) |
| CoTi-22Yan.tdb | 1323.3 | B2_BCC (x(Ti) 0.51264) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.75274) |
| CoTi-22Yan.tdb | 1301.86 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.76899) + B2_BCC (x(Ti) 0.87518) |
| CoTi-22Yan.tdb | 1301.86 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.76903) + B2_BCC (x(Ti) 0.87523) |
| CoTi-22Yan.tdb | 963.85 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.92871) + HCP_A3 (x(Ti) 0.97858) |
| CoTi-22Yan.tdb | 963.85 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.92875) + HCP_A3 (x(Ti) 0.97859) |
| CoTi-22Yan.tdb | 645.34 | HCP_A3 (x(Ti) 2.000e-5) + FCC_A1 (x(Ti) 0.0056) + L12_FCC (x(Ti) 0.24955) |
| CoTi-22Yan.tdb | 645.34 | HCP_A3 (x(Ti) 2.000e-5) + FCC_A1 (x(Ti) 0.0056) + L12_FCC (x(Ti) 0.24955) |
| CoTi-24Tur.tdb | 1521.31 | LIQUID (x(Ti) 0.30194) + C15_LAVES (x(Ti) 0.34044) + B2_BCC (x(Ti) 0.43028) |
| CoTi-24Tur.tdb | 1521.31 | LIQUID (x(Ti) 0.30194) + C15_LAVES (x(Ti) 0.34044) + B2_BCC (x(Ti) 0.43028) |
| CoTi-24Tur.tdb | 1494.67 | LIQUID (x(Ti) 0.27768) + C36_LAVES (x(Ti) 0.32202) + C15_LAVES (x(Ti) 0.33308) |
| CoTi-24Tur.tdb | 1435.12 | FCC_A1 (x(Ti) 0.1374) + L12_FCC (x(Ti) 0.20804) + LIQUID (x(Ti) 0.22473) |
| CoTi-24Tur.tdb | 1435.12 | L12_FCC#2 (x(Ti) 0.1374) + L12_FCC (x(Ti) 0.20804) + LIQUID (x(Ti) 0.22473) |
| CoTi-24Tur.tdb | 1433.94 | L12_FCC (x(Ti) 0.21367) + LIQUID (x(Ti) 0.22872) + C36_LAVES (x(Ti) 0.30212) |
| CoTi-24Tur.tdb | 1321 | B2_BCC (x(Ti) 0.51854) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.72913) |
| CoTi-24Tur.tdb | 1321 | B2_BCC (x(Ti) 0.51854) + COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.72913) |
| CoTi-24Tur.tdb | 1304.65 | COTI2 (x(Ti) 0.66667) + LIQUID (x(Ti) 0.73964) + B2_BCC (x(Ti) 0.86093) |
| CoTi-24Tur.tdb | 966.36 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.92554) + HCP_A3 (x(Ti) 0.97587) |
| CoTi-24Tur.tdb | 966.35 | COTI2 (x(Ti) 0.66667) + B2_BCC (x(Ti) 0.9256) + HCP_A3 (x(Ti) 0.97589) |
| CoTi-24Tur.tdb | 694.99 | HCP_A3 (x(Ti) 0) + FCC_A1 (x(Ti) 0) + L12_FCC (x(Ti) 0) |
| CoTi-24Tur.tdb | 631.64 | HCP_A3 (x(Ti) 1.000e-5) + FCC_A1 (x(Ti) 0.00748) + L12_FCC (x(Ti) 0.24245) |
| CoTi-24Tur.tdb | 631.64 | HCP_A3 (x(Ti) 1.000e-5) + L12_FCC (x(Ti) 0.00748) + L12_FCC#2 (x(Ti) 0.24245) |
| CoTi-24Tur.tdb | 631.64 | HCP_A3 (x(Ti) 1.000e-5) + FCC_A1 (x(Ti) 0.00748) + L12_FCC (x(Ti) 0.24246) |
| CoTi-24Tur.tdb | 372.78 | L12_FCC (x(Ti) 0.25) + C36_LAVES (x(Ti) 0.33259) + C15_LAVES (x(Ti) 0.33333) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/CO/CO-TI.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/CO/CO-TI.json) · [CALPHAD hull CoTi-00Cac](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-TI--CoTi-00Cac.json) · [CALPHAD hull CoTi-01Dav-LB](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-TI--CoTi-01Dav-LB.json) · [CALPHAD hull CoTi-18Zho](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-TI--CoTi-18Zho.json) · [CALPHAD hull CoTi-20Wu](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-TI--CoTi-20Wu.json) · [CALPHAD hull CoTi-22Yan](https://data.orchid-project.org/hulls/calphad-sgte/CO/CO-TI--CoTi-22Yan.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Co–Ti system (121)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1793.15 | congruent melting: Liquid -> B2 | L: Co 0.507; B2: Co 0.507 | experimental | [1] Wu 2020; _cites Petkov 2020_ | Table 8, p. 9, row 13; `ORC-PCKPJPBUMO` |  |
| 1778 | congruent melting: liquid ↔ CoTi | liquid: Ti 0.5; CoTi: Ti 0.5 | unspecified | [2] Yang 2022; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 5, p. 8, row 18; `ORC-VFZMSBC4C4` |  |
| 1777 | congruent melting: liquid ↔ CoTi | liquid: Ti 0.496; CoTi: Ti 0.496 | model | [2] Yang 2022 | Table 5, p. 8, row 19; `ORC-OS7YJUN6OO` |  |
| 1776 | congruent melting: liquid ↔ CoTi | liquid: Co 0.5, Ti 0.5; CoTi: Co 0.5, Ti 0.5 | unspecified | [2] Yang 2022; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 5, p. 8, row 17; `ORC-OVIYFEOUCP` |  |
| 1774.15 | congruent melting: Liquid -> B2 | L: Co 0.504; B2: Co 0.504 | experimental | [1] Wu 2020; _cites Davydov 2001_ | Table 8, p. 9, row 12; `ORC-RKQA7DDZ6K` |  |
| 1768.15 | congruent melting: Liquid -> B2 | L: Co 0.503; B2: Co 0.503 | unspecified | [1] Wu 2020 | Table 8, p. 9, row 11; `ORC-BAXLSOCI5S` |  |
| 1598 | congruent melting: liquid ↔ CoTi | liquid: Ti 0.5; CoTi: Ti 0.5 | experimental | [2] Yang 2022; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 5, p. 8, row 16; `ORC-2RKZRAM7XS` |  |
| 1524 | L + CoTi ⇄ C15 | L: Ti 0.302; CoTi: Ti 0.435; C15: Ti 0.341 | model | [3] Turchanin 2024; _cites Yang 2022_ [doi](https://doi.org/10.1007/s42243-021-00736-6) | Table 3, p. 9, row 42; `ORC-KN26BC54LL` |  |
| 1524 | liquid + CoTi ↔ β-Co2Ti | liquid: Ti 0.302; CoTi: Ti 0.435; β-Co2Ti: Ti 0.341 | model | [2] Yang 2022 | Table 5, p. 8, row 15; `ORC-TU3DC7YZDF` |  |
| 1524 | liquid + CoTi ↔ β-Co2Ti | CoTi: Co 0.5, Ti 0.5; β-Co2Ti: Co 0.666667, Ti 0.333333 | unspecified | [2] Yang 2022; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 5, p. 8, row 14; `ORC-YUFZRHRKY6` |  |
| 1524 | L + CoTi ⇄ C15 | L: Ti 0.335; CoTi: Ti 0.44; C15: Ti 0.339 | experimental | [3] Turchanin 2024; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 3, p. 9, row 38; `ORC-ZYEBQXCU3O` |  |
| 1522 | L + CoTi ⇄ C15 | L: Ti 0.302; CoTi: Ti 0.43; C15: Ti 0.34 | model | [3] Turchanin 2024 | Table 3, p. 9, row 43; `ORC-MJV7QVLWWS` |  |
| 1515 | B2 + liquid = C15 | B2: Ti 0.44; L: Ti 0.293; C15: Ti 0.327 | model | [4] Davydov 2001 | Table VI, p. 11, row 12; `ORC-ZX5MMDFQJ5` |  |
| 1509 | B2 + liquid = C15 | B2: Ti 0.43; L: Ti 0.285; C15: Ti 0.326 | model | [4] Davydov 2001 | Table VI, p. 11, row 11; `ORC-FF4E6G5GIM` |  |
| 1509 | L + CoTi ⇄ C15 | L: Ti 0.285; CoTi: Ti 0.43; C15: Ti 0.326 | model | [3] Turchanin 2024; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 3, p. 9, row 40; `ORC-PUCMP65AW2` |  |
| 1508.15 | Liquid + B2 -> C15 | L: Co 0.697; B2: Co 0.587; C15: Co 0.666 | experimental | [1] Wu 2020; _cites Petkov 2020_ | Table 8, p. 9, row 10; `ORC-3T4RL52PC2` |  |
| 1508 | Liquid + B2->C15 | Liquid: Ti 0.328; B2: Ti 0.448; C15: Ti 0.335 | experimental | [5] Cacciamani 2000; _cites Murray 1987_ | Table 4, p. 7, row 7; `ORC-6NRXKGV4GP` |  |
| 1508 | L + CoTi ⇄ C15 | L: Ti 0.303; CoTi: Ti 0.413; C15: Ti 0.334 | experimental | [3] Turchanin 2024; _cites Petkov 1971_ | Table 3, p. 9, row 37; `ORC-CMFT2T77HU` |  |
| 1508 | liquid + CoTi ↔ β-Co2Ti | liquid: Ti 0.338; CoTi: Ti 0.448; β-Co2Ti: Ti 0.345 | experimental | [2] Yang 2022; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 5, p. 8, row 12; `ORC-G5FBPT6Z6F` |  |
| 1508 | B2 + liquid = C15 | B2: Ti 0.448; L: Ti 0.328; C15: Ti 0.335 | model | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table VI, p. 11, row 13; `ORC-ZTSX3BCGRN` |  |
| 1506.15 | Liquid + B2 -> C15 | L: Co 0.714; B2: Co 0.568; C15: Co 0.674 | unspecified | [1] Wu 2020 | Table 8, p. 9, row 9; `ORC-B63WE5LT2I` |  |
| 1506 | L + CoTi ⇄ C15 | L: Ti 0.286; CoTi: Ti 0.432; C15: Ti 0.326 | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 41; `ORC-FVQLO7L67U` |  |
| 1496 | L + C15 ⇄ C36 | L: Ti 0.285; C15: Ti 0.333; C36: Ti 0.331 | experimental | [3] Turchanin 2024; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 3, p. 9, row 31; `ORC-LE7S2PSEY2` |  |
| 1496 | liquid + β-Co2Ti ↔ γ-Co2Ti | β-Co2Ti: Co 0.666667, Ti 0.333333 | unspecified | [2] Yang 2022; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 5, p. 8, row 10; `ORC-N4S7BAA4ZM` |  |
| 1495 | liquid + β-Co2Ti ↔ γ-Co2Ti | liquid: Ti 0.271; β-Co2Ti: Ti 0.334; γ-Co2Ti: Ti 0.326 | model | [2] Yang 2022 | Table 5, p. 8, row 11; `ORC-LGJGNBIA67` |  |
| 1495 | L + C15 ⇄ C36 | L: Ti 0.271; C15: Ti 0.334; C36: Ti 0.326 | model | [3] Turchanin 2024; _cites Yang 2022_ [doi](https://doi.org/10.1007/s42243-021-00736-6) | Table 3, p. 9, row 35; `ORC-QUBT7E2BAW` |  |
| 1494 | L + C15 ⇄ C36 | L: Ti 0.277; C15: Ti 0.333; C36: Ti 0.322 | model | [3] Turchanin 2024 | Table 3, p. 9, row 36; `ORC-XKKNIIU6WI` |  |
| 1492 | Liquid + B2->C15 | Liquid: Ti 0.298; B2: Ti 0.414; C15: Ti 0.325 | model | [5] Cacciamani 2000 | Table 4, p. 7, row 8; `ORC-DRNVGKSGWR` |  |
| 1492 | L + CoTi ⇄ C15 | L: Ti 0.298; CoTi: Ti 0.414; C15: Ti 0.325 | model | [3] Turchanin 2024; _cites Cacciamani 2000_ [doi](https://doi.org/10.1016/s0966-9795%2899%2900098-9) | Table 3, p. 9, row 39; `ORC-KA2C22KNOF` |  |
| 1484 | L + C15 ⇄ C36 | L: Ti 0.281; C15: Ti 0.321; C36: Ti 0.314 | model | [3] Turchanin 2024; _cites Cacciamani 2000_ [doi](https://doi.org/10.1016/s0966-9795%2899%2900098-9) | Table 3, p. 9, row 32; `ORC-2DK7S2ZWAH` |  |
| 1484 | Liquid + C15->C36 | Liquid: Ti 0.281; C15: Ti 0.321; C36: Ti 0.314 | model | [5] Cacciamani 2000 | Table 4, p. 7, row 10; `ORC-MQT7ZS5L3E` |  |
| 1483.15 | Liquid + A1 -> L12 | L: Co 0.817; A1: Co 0.793; L12: Co 0.855 | experimental | [1] Wu 2020; _cites Petkov 2020_ | Table 8, p. 9, row 3; `ORC-JQL7LSNMYQ` |  |
| 1483.15 | Liquid + C15 -> C36 | L: Co 0.725; C15: Co 0.668; C36: Co 0.695 | experimental | [1] Wu 2020; _cites Petkov 2020_ | Table 8, p. 9, row 8; `ORC-OQNDOFYPOG` |  |
| 1483 | Liquid + C15->C36 | Liquid: Ti 0.29; C15: Ti 0.33; C36: Ti 0.312 | experimental | [5] Cacciamani 2000; _cites Murray 1987_ | Table 4, p. 7, row 9; `ORC-2DSO62GZAU` |  |
| 1483 | liquid + α-Co ↔ Co3Ti | liquid: Ti 0.195; α-Co: Ti 0.144; Co3Ti: Ti 0.191 | experimental | [2] Yang 2022; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 5, p. 8, row 1; `ORC-BOURJUM5TX` |  |
| 1483 | L + (αCo) ⇄ Co3Ti | L: Ti 0.207; (αCo): Ti 0.145; Co3Ti: Ti 0.183 | experimental | [3] Turchanin 2024; _cites Petkov 1971_ | Table 3, p. 9, row 14; `ORC-JNE5PHESQG.685029` |  |
| 1483 | L + C15 ⇄ C36 | L: Ti 0.275; C15: Ti 0.332; C36: Ti 0.305 | experimental | [3] Turchanin 2024; _cites Petkov 1971_ | Table 3, p. 9, row 30; `ORC-JNE5PHESQG.74a098` |  |
| 1483 | C15 + liquid = C36 | C15: Ti 0.33; L: Ti 0.29; C36: Ti 0.313 | model | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table VI, p. 11, row 15; `ORC-NK4SR65AC3` |  |
| 1483 | Liquid + A1 = L12 | L: Ti 0.207; A1: Ti 0.141; L12: Ti 0.193 | model | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table VI, p. 11, row 20; `ORC-RIQVWCKACZ` |  |
| 1483 | liquid + β-Co2Ti ↔ γ-Co2Ti | liquid: Ti 0.29; β-Co2Ti: Ti 0.344; γ-Co2Ti: Ti 0.313 | experimental | [2] Yang 2022; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 5, p. 8, row 9; `ORC-WNQIJ3FFIH` |  |
| 1475 | C15 + liquid = C36 | C15: Ti 0.32; L: Ti 0.252; C36: Ti 0.309 | model | [4] Davydov 2001 | Table VI, p. 11, row 14; `ORC-IEHLENGM7Y` |  |
| 1475 | L + C15 ⇄ C36 | L: Ti 0.252; C15: Ti 0.32; C36: Ti 0.309 | model | [3] Turchanin 2024; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 3, p. 9, row 33; `ORC-UJ4HRDMHOZ` |  |
| 1473.15 | Liquid + C15 -> C36 | L: Co 0.75; C15: Co 0.68; C36: Co 0.691 | unspecified | [1] Wu 2020 | Table 8, p. 9, row 7; `ORC-3PCE4PUNFQ` |  |
| 1473 | L + C15 ⇄ C36 | L: Ti 0.25; C15: Ti 0.32; C36: Ti 0.309 | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 34; `ORC-N7XXOR4WDS` |  |
| 1463 | Liquid + A1->L12 | Liquid: Ti 0.193; A1: Ti 0.207; L12: Ti 0.141 | experimental | [5] Cacciamani 2000; _cites Murray 1987_ | Table 4, p. 7, row 13; `ORC-FTFD6ZJ33K` |  |
| 1459 | C36 + liquid = L12 | C36: Ti 0.303; L: Ti 0.239; L12: Ti 0.242 | model | [4] Davydov 2001 | Table VI, p. 11, row 16; `ORC-Q2HMNIB5YP` |  |
| 1459 | L ⇄ Co3Ti + C36 | L: Ti 0.239; Co3Ti: Ti 0.242; C36: Ti 0.303 | model | [3] Turchanin 2024; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 3, p. 9, row 26; `ORC-XLXKOAGF2R` |  |
| 1455 | Liquid + A1 = L12 | L: Ti 0.202; A1: Ti 0.154; L12: Ti 0.2 | model | [4] Davydov 2001 | Table VI, p. 11, row 19; `ORC-3HS7E2HZ73` |  |
| 1455 | Liquid + A1->L12 | Liquid: Ti 0.211; A1: Ti 0.22; L12: Ti 0.144 | model | [5] Cacciamani 2000 | Table 4, p. 7, row 14; `ORC-3SWUQ2BHPQ` |  |
| 1455 | L + (αCo) ⇄ Co3Ti | L: Ti 0.202; (αCo): Ti 0.154; Co3Ti: Ti 0.2 | model | [3] Turchanin 2024; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 3, p. 9, row 18; `ORC-OR6LMMZ7CV` |  |
| 1455 | L + (αCo) ⇄ Co3Ti | L: Ti 0.211; (αCo): Ti 0.144; Co3Ti: Ti 0.22 | model | [3] Turchanin 2024; _cites Cacciamani 2000_ [doi](https://doi.org/10.1016/s0966-9795%2899%2900098-9) | Table 3, p. 9, row 17; `ORC-TAS2ZUZFAE` |  |
| 1453 | L ⇄ Co3Ti + C36 | L: Ti 0.231; Co3Ti: Ti 0.237; C36: Ti 0.293 | model | [3] Turchanin 2024; _cites Cacciamani 2000_ [doi](https://doi.org/10.1016/s0966-9795%2899%2900098-9) | Table 3, p. 9, row 25; `ORC-NYX434YSY2` |  |
| 1453 | eutectic: Liquid->C36 + L12 | Liquid: Ti 0.231; C36: Ti 0.293; L12: Ti 0.237 | model | [5] Cacciamani 2000 | Table 4, p. 7, row 12; `ORC-O3FOEZ5VUT` |  |
| 1443.15 | eutectic: Liquid -> C36 + L12 | L: Co 0.77; C36: Co 0.709; L12: Co 0.781 | experimental | [1] Wu 2020; _cites Petkov 2020_ | Table 8, p. 9, row 6; `ORC-3B3JLNRUNJ` |  |
| 1443 | L ⇄ Co3Ti + C36 | L: Ti 0.23; Co3Ti: Ti 0.219; C36: Ti 0.291 | experimental | [3] Turchanin 2024; _cites Petkov 1971_ | Table 3, p. 9, row 22; `ORC-6OSPRWQ5RH` |  |
| 1443 | C36 + liquid = L12 | C36: Ti 0.28; L: Ti 0.228; L12: Ti 0.242 | model | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table VI, p. 11, row 17; `ORC-O6E3MHWP23` |  |
| 1443 | eutectic: Liquid->C36 + L12 | Liquid: Ti 0.242; C36: Ti 0.28; L12: Ti 0.228 | experimental | [5] Cacciamani 2000; _cites Murray 1987_ | Table 4, p. 7, row 11; `ORC-QAXB6KT2XQ` |  |
| 1443 | liquid ↔ Co3Ti + γ-Co2Ti | liquid: Ti 0.242; Co3Ti: Ti 0.227; γ-Co2Ti: Ti 0.313 | experimental | [2] Yang 2022; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 5, p. 8, row 5; `ORC-TWKOEP7YZQ` |  |
| 1439.15 | Liquid + A1 -> L12 | L: Co 0.801; A1: Co 0.793; L12: Co 0.847 | unspecified | [1] Wu 2020 | Table 8, p. 9, row 1; `ORC-OPK2MBUASM` |  |
| 1439 | L + (αCo) ⇄ Co3Ti | L: Ti 0.207; (αCo): Ti 0.153; Co3Ti: Ti 0.199 | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 19; `ORC-VIHHNBYE2H` |  |
| 1437.15 | eutectic: Liquid -> C36 + L12 | L: Co 0.78; C36: Co 0.707; L12: Co 0.782 | unspecified | [1] Wu 2020 | Table 8, p. 9, row 4; `ORC-JGVDEFUDAO` |  |
| 1437 | L ⇄ Co3Ti + C36 | L: Ti 0.22; Co3Ti: Ti 0.218; C36: Ti 0.293 | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 27; `ORC-LLFMYJVZR5` |  |
| 1434 | L + (αCo) ⇄ Co3Ti | L: Ti 0.225; (αCo): Ti 0.138; Co3Ti: Ti 0.21 | model | [3] Turchanin 2024 | Table 3, p. 9, row 21; `ORC-KVCMOQA3BP` |  |
| 1433 | liquid + α-Co ↔ Co3Ti | liquid: Ti 0.203; α-Co: Ti 0.154; Co3Ti: Ti 0.193 | model | [2] Yang 2022 | Table 5, p. 8, row 4; `ORC-66ZWD7YUGR` |  |
| 1433 | L ⇄ Co3Ti + C36 | L: Ti 0.228; Co3Ti: Ti 0.214; C36: Ti 0.302 | model | [3] Turchanin 2024 | Table 3, p. 9, row 29; `ORC-BPMGFL3FBR` |  |
| 1433 | L + (αCo) ⇄ Co3Ti | L: Ti 0.203; (αCo): Ti 0.154; Co3Ti: Ti 0.193 | model | [3] Turchanin 2024; _cites Yang 2022_ [doi](https://doi.org/10.1007/s42243-021-00736-6) | Table 3, p. 9, row 20; `ORC-FCEAKKVHPD` |  |
| 1431 | L ⇄ Co3Ti + C36 | L: Ti 0.24; Co3Ti: Ti 0.25; C36: Ti 0.293 | experimental | [3] Turchanin 2024; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 3, p. 9, row 23; `ORC-2SZELSZS4Z` |  |
| 1431 | L ⇄ Co3Ti + C36 | L: Ti 0.224; Co3Ti: Ti 0.223; C36: Ti 0.315 | model | [3] Turchanin 2024; _cites Yang 2022_ [doi](https://doi.org/10.1007/s42243-021-00736-6) | Table 3, p. 9, row 28; `ORC-7GLUH23IHO` |  |
| 1431 | liquid ↔ Co3Ti + γ-Co2Ti | liquid: Ti 0.224; Co3Ti: Ti 0.223; γ-Co2Ti: Ti 0.315 | model | [2] Yang 2022 | Table 5, p. 8, row 8; `ORC-HSJ7BVXYSA` |  |
| 1431 | liquid ↔ Co3Ti + γ-Co2Ti | Co3Ti: Co 0.75, Ti 0.25 | unspecified | [2] Yang 2022; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 5, p. 8, row 7; `ORC-LWXOLIJNKD` |  |
| 1429.15 | peritectic: L + A1(αCo) -> L12 |  | experimental | [1] Wu 2020 | Table 4, p. 5, row 1; `ORC-ISX6Q5KD66` |  |
| 1429.15 | Liquid + A1 -> L12 |  | experimental | [1] Wu 2020 | Table 8, p. 9, row 2; `ORC-KPSNQP2CZI` |  |
| 1429 | liquid + α-Co ↔ Co3Ti | Co3Ti: Co 0.75, Ti 0.25 | unspecified | [2] Yang 2022; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 5, p. 8, row 2; `ORC-WFV57QMZSW` |  |
| 1429 | L + (αCo) ⇄ Co3Ti | Co3Ti: Ti 0.25 | experimental | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 16; `ORC-XRQXV5BUFN` |  |
| 1428 | L + (αCo) ⇄ Co3Ti | L: Ti 0.23; (αCo): Ti 0.151; Co3Ti: Ti 0.215 | experimental | [3] Turchanin 2024; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 3, p. 9, row 15; `ORC-GNFJGQYRB5` |  |
| 1428 | liquid + α-Co ↔ Co3Ti | liquid: Ti 0.215; α-Co: Ti 0.151; Co3Ti: Co 0.75, Ti 0.25 | unspecified | [2] Yang 2022; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 5, p. 8, row 3; `ORC-LYGSJG4QLV` |  |
| 1427.15 | eutectic: Liquid -> C36 + L12 |  | experimental | [1] Wu 2020 | Table 8, p. 9, row 5; `ORC-KBQVUVW5YF` |  |
| 1427.15 | eutectic |  | experimental | [1] Wu 2020 | p. 11; `ORC-OIQW6WJYC5` | “The invariant equilibrium among liquid, C36 and L12 is determined to be eutectic experimentally. The eutectic temperature has been determined to be 1154 °C by means of DSC technique.” |
| 1427.15 | eutectic: L -> L12 + C36 |  | experimental | [1] Wu 2020 | Table 4, p. 5, row 2; `ORC-VZ7PUHEWFC` |  |
| 1427 | liquid ↔ Co3Ti + γ-Co2Ti | Co3Ti: Co 0.75, Ti 0.25 | unspecified | [2] Yang 2022; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 5, p. 8, row 6; `ORC-L4AKY7V3OP` |  |
| 1427 | L ⇄ Co3Ti + C36 | Co3Ti: Ti 0.25 | experimental | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 24; `ORC-UPIQPHFF4X` |  |
| 1427 | eutectic |  | experimental | [2] Yang 2022 | p. 2; `ORC-W3ZMKHI6VF` | “The invariant reaction among liquid, Co3Ti and c-Co2Ti was deduced to be a eutectic type with the temperature of 1427 ± 3 K.” |
| 1334.15 | Liquid + B2 -> E93 | L: Co 0.241; B2: Co 0.479; E93: Co 0.333 | unspecified | [1] Wu 2020 | Table 8, p. 9, row 14; `ORC-P6W56B3VOC` |  |
| 1333 | Liquid + B2 = CoTi2 | L: Ti 0.762; B2: Ti 0.523; CoTi2: Ti 0.667 | model | [4] Davydov 2001 | Table VI, p. 11, row 5; `ORC-Z4FRQHZSXQ` |  |
| 1331 | Liquid + B2 = CoTi2 | L: Ti 0.729; B2: Ti 0.51; CoTi2: Ti 0.669 | model | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table VI, p. 11, row 7; `ORC-LG4GMYFFA2` |  |
| 1331 | Liquid + B2->CoTi2 | Liquid: Ti 0.729; B2: Ti 0.51; CoTi2: Ti 0.669 | experimental | [5] Cacciamani 2000; _cites Murray 1987_ | Table 4, p. 7, row 5; `ORC-Q5OFTLXPYF` |  |
| 1331 | liquid + CoTi ↔ CoTi2 | liquid: Ti 0.729; CoTi: Ti 0.503; CoTi2: Ti 0.67 | experimental | [2] Yang 2022; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 5, p. 8, row 20; `ORC-R5ETN46NGI` |  |
| 1330 | Liquid + B2 = CoTi2 | L: Ti 0.764; B2: Ti 0.522; CoTi2: Ti 0.667 | model | [4] Davydov 2001 | Table VI, p. 11, row 6; `ORC-CRUMZJLPVE` |  |
| 1328.15 | Liquid + B2 -> E93 | L: Co 0.296; B2: Co 0.5; E93: Co 0.331 | experimental | [1] Wu 2020; _cites Orrell 1955_ | Table 8, p. 9, row 15; `ORC-PGCYOHQHDN` |  |
| 1323 | liquid + CoTi ↔ CoTi2 | CoTi: Co 0.5, Ti 0.5; CoTi2: Co 0.333333, Ti 0.666667 | experimental | [2] Yang 2022 | Table 5, p. 8, row 21; `ORC-7VJ6XIW4E2` |  |
| 1323 | liquid + CoTi ↔ CoTi2 | liquid: Ti 0.753; CoTi: Ti 0.513; CoTi2: Ti 0.667 | model | [2] Yang 2022 | Table 5, p. 8, row 22; `ORC-B5ETWI5VRK` |  |
| 1323 | Liquid + B2->CoTi2 | Liquid: Ti 0.736; B2: Ti 0.528; CoTi2: Ti 0.667 | model | [5] Cacciamani 2000 | Table 4, p. 7, row 6; `ORC-BNXDNW7PVV` |  |
| 1302 | liquid ↔ CoTi2 + β-Ti | liquid: Ti 0.769; CoTi2: Ti 0.667; β-Ti: Ti 0.875 | model | [2] Yang 2022 | Table 5, p. 8, row 26; `ORC-ESXAWH3BRY` |  |
| 1302 | liquid ↔ CoTi2 + β-Ti | CoTi2: Co 0.333333, Ti 0.666667 | experimental | [2] Yang 2022 | Table 5, p. 8, row 25; `ORC-QAAMBIJNUZ` |  |
| 1293.15 | eutectic: Liquid -> A2 + E93 | L: Co 0.27; A2: Co 0.17; E93: Co 0.329 | experimental | [1] Wu 2020; _cites Orrell 1955_ | Table 8, p. 9, row 17; `ORC-6CMG3IP2BC` |  |
| 1293 | eutectic: Liquid->A2 + CoTi2 | Liquid: Ti 0.768; A2: Ti 0.855; CoTi2: Ti 0.671 | experimental | [5] Cacciamani 2000; _cites Murray 1987_ | Table 4, p. 7, row 1; `ORC-3PJDHXML6Z` |  |
| 1293 | Liquid = A2 + CoTi2 | L: Ti 0.768; A2: Ti 0.855; CoTi2: Ti 0.669 | model | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table VI, p. 11, row 4; `ORC-B4MH47KTI2` |  |
| 1293 | Liquid = A2 + CoTi2 | L: Ti 0.787; A2: Ti 0.855; CoTi2: Ti 0.667 | model | [4] Davydov 2001 | Table VI, p. 11, row 3; `ORC-M3UXUVNWOU` |  |
| 1293 | liquid ↔ CoTi2 + β-Ti | liquid: Ti 0.768; CoTi2: Ti 0.67; β-Ti: Ti 0.855 | experimental | [2] Yang 2022; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 5, p. 8, row 23; `ORC-V6B4XR2JVW` |  |
| 1288 | eutectic: Liquid->A2 + CoTi2 | Liquid: Ti 0.766; A2: Ti 0.88; CoTi2: Ti 0.667 | model | [5] Cacciamani 2000 | Table 4, p. 7, row 2; `ORC-D222TH4BN4` |  |
| 1283.15 | eutectic: Liquid -> A2 + E93 | L: Co 0.211; A2: Co 0.14; E93: Co 0.333 | unspecified | [1] Wu 2020 | Table 8, p. 9, row 16; `ORC-GAEDLL72ZQ` |  |
| 967.15 | eutectoid: A2(βTi) -> A3(αTi) + E93 | E93: Co 0.333333, Ti 0.666667 | experimental | [1] Wu 2020 | Table 4, p. 5, row 3; `ORC-666EJXRER5` |  |
| 967.15 | A2 -> A3 + E93 | E93: Co 0.333333, Ti 0.666667 | experimental | [1] Wu 2020 | Table 8, p. 9, row 19; `ORC-M7XHYDGHNC` |  |
| 967 | β-Ti ↔ CoTi2 + α-Ti | CoTi2: Co 0.333333, Ti 0.666667 | unspecified | [2] Yang 2022; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 5, p. 8, row 28; `ORC-ZXON6HCKXK` |  |
| 964 | β-Ti ↔ CoTi2 + α-Ti | β-Ti: Ti 0.929; CoTi2: Ti 0.667; α-Ti: Ti 0.979 | model | [2] Yang 2022 | Table 5, p. 8, row 30; `ORC-3JOQMVRLWQ` |  |
| 964 | β-Ti ↔ CoTi2 + α-Ti | CoTi2: Co 0.333333, Ti 0.666667 | experimental | [2] Yang 2022 | Table 5, p. 8, row 29; `ORC-TBEKUOBVV7` |  |
| 959 | A2 = A3 + CoTi2 | A2: Ti 0.93; A3: Ti 0.981; CoTi2: Ti 0.667 | model | [4] Davydov 2001 | Table VI, p. 11, row 1; `ORC-GVPWS4BQOM` |  |
| 958.15 | A2 -> A3 + E93 | A2: Co 0.069; A3: Co 0.019; E93: Co 0.333 | unspecified | [1] Wu 2020 | Table 8, p. 9, row 18; `ORC-HMIBAGEKUG` |  |
| 958.15 | A2 -> A3 + E93 | A2: Co 0.095; A3: Co 0.009; E93: Co 0.332 | experimental | [1] Wu 2020; _cites Orrell 1955_ | Table 8, p. 9, row 20; `ORC-TQ34ZHRSUB` |  |
| 958 | A2 = A3 + CoTi2 | A2: Ti 0.93; A3: Ti 0.991; CoTi2: Ti 0.668 | model | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table VI, p. 11, row 2; `ORC-JSQW74J5UI` |  |
| 958 | A2->A3 + CoTi2 | A2: Ti 0.93; A3: Ti 0.991; CoTi2: Ti 0.668 | experimental | [5] Cacciamani 2000; _cites Murray 1987_ | Table 4, p. 7, row 3; `ORC-TQWGMZAB25` |  |
| 958 | β-Ti ↔ CoTi2 + α-Ti | β-Ti: Ti 0.94; CoTi2: Ti 0.67; α-Ti: Ti 0.991 | experimental | [2] Yang 2022; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 5, p. 8, row 27; `ORC-X6FRKLSVFV` |  |
| 945 | A2->A3 + CoTi2 | A2: Ti 0.93; A3: Ti 0.987; CoTi2: Ti 0.667 | model | [5] Cacciamani 2000 | Table 4, p. 7, row 4; `ORC-3I4UQMOJHI` |  |
| 673 | (αCo) ⇄ (εCo) + Co3Ti | Co3Ti: Ti 0.25 | experimental | [3] Turchanin 2024; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 3, p. 9, row 1; `ORC-OHYDDZOQZO` |  |
| 670 | (αCo) ⇄ (εCo) + Co3Ti | (αCo): Ti 0.003; (εCo): Ti 3.000e-4; Co3Ti: Ti 0.25 | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 4; `ORC-HWFWCEDPA2` |  |
| 646 | (αCo) ⇄ (εCo) + Co3Ti | (αCo): Ti 0.006; (εCo): Ti 2.000e-4; Co3Ti: Ti 0.25 | model | [3] Turchanin 2024; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 3, p. 9, row 3; `ORC-HV377PLNZ4` |  |
| 645 | α-Co ↔ ε-Co + Co3Ti | α-Co: Ti 0.001; ε-Co: Ti 0.001; Co3Ti: Ti 0.25 | model | [2] Yang 2022 | Table 5, p. 8, row 31; `ORC-PV2TU3AHIA` |  |
| 642 | (αCo) ⇄ (εCo) + Co3Ti | (αCo): Ti 0.001; (εCo): Ti 0.001; Co3Ti: Ti 0.25 | model | [3] Turchanin 2024; _cites Yang 2022_ [doi](https://doi.org/10.1007/s42243-021-00736-6) | Table 3, p. 9, row 5; `ORC-XCX5DDMSHJ` |  |
| 640 | A1 = L12 + A3 | A1: Ti 0.006; L12: Ti 0.25; A3: Ti 2.000e-4 | model | [4] Davydov 2001 | Table VI, p. 11, row 21; `ORC-BTVWN37C3A` |  |
| 627 | (αCo) ⇄ (εCo) + Co3Ti | (αCo): Ti 0.008; (εCo): Ti 6.000e-6; Co3Ti: Ti 0.246 | model | [3] Turchanin 2024 | Table 3, p. 9, row 6; `ORC-SEDBLZHBOM` |  |
| 585 | (αCo) ⇄ (εCo) + Co3Ti | (αCo): Ti 0.011; Co3Ti: Ti 0.248 | model | [3] Turchanin 2024; _cites Cacciamani 2000_ [doi](https://doi.org/10.1016/s0966-9795%2899%2900098-9) | Table 3, p. 9, row 2; `ORC-DIZPJWFX7Q` |  |

## Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from [dft_parity.json](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, Co–Ti system (19)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| B2 |  | -44.4 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Wu 2020; _cites Gomozov 1986_ | Table 7, p. 9, row 8; `ORC-ATCMMFBKNQ` |  |
| B2 |  | -44.3 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Wu 2020; _cites Gachon 1981_ [doi](https://doi.org/10.1016/0040-6031%2881%2987031-1) | Table 7, p. 9, row 6; `ORC-SF3KINKKPO` |  |
| B2 |  | -43.1256 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Wu 2020 | Table 7, p. 9, row 5; `ORC-V3SQZN2JED` |  |
| B2 |  | -42.2 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001 | Table I, p. 2, row 7; `ORC-ONVFJ74CM4.632050` |  |
| B2 |  | -42.2 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001; _cites Kaufman 1975_ [doi](https://doi.org/10.1007/bf03161838) | Table I, p. 2, row 2; `ORC-YXDF4CM5JP.93ba3a` |  |
| B2 |  | -42.177 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001 | Table V, p. 10, row 4; `ORC-YFY7FGZI74.152cc9` |  |
| B2 |  | -41.3 kJ/mol (basis unstated) ± 0.9 | 298.15 | experimental |  |  | [1] Wu 2020; _cites Guo 1998_ [doi](https://doi.org/10.1016/s0925-8388%2898%2900246-1) | Table 7, p. 9, row 7; `ORC-YIUO235IL7.f5a495` |  |
| B2 |  | -40.9 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001; _cites Cacciamani 2001_ | Table I, p. 2, row 6; `ORC-MD7PSOS7LA.f8a3e9` |  |
| B2 |  | -40.5 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001; _cites Nash 1998_ [doi](https://doi.org/10.1023/a:1004478101233) | Table I, p. 2, row 5; `ORC-EZST37FRWY.1667d7` |  |
| B2 |  | -33.3 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table I, p. 2, row 1; `ORC-QMTAWZ5EAQ` |  |
| C15 |  | -28.219 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001 | Table V, p. 10, row 3; `ORC-H5XJE3WQ3B.1ab033` |  |
| C36 |  | -27.246 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001 | Table V, p. 10, row 2; `ORC-4P6ZI6VCXK.b95f97` |  |
| Co2Ti |  | -34.1 kJ/mol (basis unstated) | 298.15 | experimental |  |  | [1] Wu 2020; _cites Gachon 1981_ [doi](https://doi.org/10.1016/0040-6031%2881%2987031-1) | Table 7, p. 9, row 4; `ORC-S5A6CJIAXK` |  |
| Co2Ti |  | -32.2062 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Wu 2020 | Table 7, p. 9, row 3; `ORC-A4GL2URJTS` |  |
| CoTi2 |  | -33.8676 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Wu 2020 | Table 7, p. 9, row 9; `ORC-YH6KKIDY5E` |  |
| CoTi2 | [CoTi2](https://data.orchid-project.org/compounds/CoTi2.html) | -33.763 kJ/mol-atom | 298.15 | model | -27.489 (mp-aaacpuil) | -32.436 (oqmd-1374887) | [4] Davydov 2001 | Table V, p. 10, row 5; `ORC-QJ72ZIOZW5.36d040` |  |
| L12 |  | -26.1875 kJ/mol (basis unstated) ± 1.4 | 298.15 | experimental |  |  | [1] Wu 2020; _cites Balarin 1996_ [doi](https://doi.org/10.1002/zaac.19966220529) | Table 7, p. 9, row 2; `ORC-2EXED2CKIJ.66f514` |  |
| L12 |  | -24.8211 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Wu 2020 | Table 7, p. 9, row 1; `ORC-4HVCNPV4GW` |  |
| L12 |  | -20.823 kJ/mol-atom | 298.15 | model |  |  | [4] Davydov 2001 | Table V, p. 10, row 1; `ORC-BA3RFQJPHI.98f2cc` |  |

## Other properties

### Phase transition (62)

Table: Phase transition, Co–Ti system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 400 K | 400 | other: C36 -> L12 + C15 | model | [5] Cacciamani 2000 | p. 7; `ORC-G25455Y6FU` | “In the computed phase diagram C36 decomposes at about 400 K into L12+C15.” |
| Phase transition | 962 K | 962 | eutectoid: β-Ti ↔ CoTi2 + α-Ti | experimental | [2] Yang 2022 | Table 3, p. 5, row 7; `ORC-H22UCOT4BS` |  |
| Phase transition | 964 K | 964 | (bTi) CoTi2 ? (aTi) | experimental | [3] Turchanin 2024 | p. 3; `ORC-OFULSHYG67.1bcb5b` | “The temperatures of three invariant reactions of L ? CoTi CoTi2, L CoTi2 ? (bTi), and (bTi) CoTi2 ? (aTi) were determined to be 1323, 1302, and 964 K, respectively.” |
| Phase transition | 964 K | 964 | eutectoid: β-Ti ↔ CoTi2 + α-Ti | experimental | [2] Yang 2022 | Table 3, p. 5, row 4; `ORC-JIX5QSTRHK` |  |
| Phase transition | 966 K | 966 | eutectoid: β-Ti ↔ CoTi2 + α-Ti | experimental | [2] Yang 2022 | Table 3, p. 5, row 9; `ORC-HLYR4DGIRR` |  |
| Phase transition | 967 K | 967 | (bTi) CoTi2 ? (aTi) | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | p. 2; `ORC-OH3DEX2HLR` | “Also, the temperature of the invariant reaction (bTi) CoTi2 ? (aTi) at 967 K was established.” |
| Phase transition | 967 K | 967 | b-Ti ? CoTi2 ? a-Ti | experimental | [2] Yang 2022 | p. 2; `ORC-CKXX5CD4IV.417545` | “The temperatures of two invariant reactions liquid ? aCo ? Co3Ti and b-Ti ? CoTi2 ? a-Ti were 1429 and 967 K with an accuracy of ± 3 K.” |
| Phase transition | 1119 K | 1119 | (αCo)ferro ⇄ (αCo)para; _(αCo)ferro: Ti 0.083; (αCo)para: Ti 0.083_ | model | [3] Turchanin 2024; _cites Yang 2022_ [doi](https://doi.org/10.1007/s42243-021-00736-6) | Table 3, p. 9, row 12; `ORC-7E3MTXZUYD` |  |
| Phase transition | 1121 K | 1121 | (αCo)ferro ⇄ (αCo)para; _(αCo)ferro: Ti 0.073; (αCo)para: Ti 0.073_ | experimental | [3] Turchanin 2024; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 3, p. 9, row 8; `ORC-S6HSD4OAWA` |  |
| Phase transition | 1121 K | 1121 | magnetic | model | [3] Turchanin 2024; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | p. 2; `ORC-5NXFZH4LBL.05b2d8` | “The TC decreases from 1388 K for a pure Co sample to a constant temperature of 1121 ± 1 K within the two-phase region (aCo) ? TiCo3 at 7.3-16.9 at.% Ti.” |
| Phase transition | 1129 K | 1129 | (αCo)ferro ⇄ (αCo)para; _(αCo)ferro: Ti 0.075; (αCo)para: Ti 0.075_ | model | [3] Turchanin 2024 | Table 3, p. 9, row 13; `ORC-HPRNXHL5DL` |  |
| Phase transition | 1143 K | 1143 | (αCo)ferro ⇄ (αCo)para; _(αCo)ferro: Ti 0.095; (αCo)para: Ti 0.095_ | experimental | [3] Turchanin 2024; _cites Murray 1982_ [doi](https://doi.org/10.1007/bf02873414) | Table 3, p. 9, row 7; `ORC-TXEIH2KZCI` |  |
| Phase transition | 1173 K | 1173 | (αCo)ferro ⇄ (αCo)para; _(αCo)ferro: Ti 0.096; (αCo)para: Ti 0.096_ | model | [3] Turchanin 2024; _cites Cacciamani 2000_ [doi](https://doi.org/10.1016/s0966-9795%2899%2900098-9) | Table 3, p. 9, row 9; `ORC-36YTGKGAEL` |  |
| Phase transition | 1178 K | 1178 | (αCo)ferro ⇄ (αCo)para; _(αCo)ferro: Ti 0.081; (αCo)para: Ti 0.081_ | model | [3] Turchanin 2024; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 3, p. 9, row 10; `ORC-KQ2IFO2LJY` |  |
| Phase transition | 1190 K | 1190 | (αCo)ferro ⇄ (αCo)para; _(αCo)ferro: Ti 0.077; (αCo)para: Ti 0.077_ | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 11; `ORC-QTKQW7WYMK` |  |
| Phase transition | 1300 K | 1300 | eutectic: liquid ↔ CoTi2 + β-Ti | experimental | [2] Yang 2022 | Table 3, p. 5, row 6; `ORC-5YSFULRSY3` |  |
| Phase transition | 1301 K | 1301 | eutectic: liquid ↔ CoTi2 + β-Ti | experimental | [2] Yang 2022 | Table 3, p. 5, row 3; `ORC-M2UKALAVFW` |  |
| Phase transition | 1302 K | 1302 | L CoTi2 ? (bTi) | experimental | [3] Turchanin 2024 | p. 3; `ORC-OFULSHYG67.9b945b` | “The temperatures of three invariant reactions of L ? CoTi CoTi2, L CoTi2 ? (bTi), and (bTi) CoTi2 ? (aTi) were determined to be 1323, 1302, and 964 K, respectively.” |
| Phase transition | 1304 K | 1304 | eutectic: liquid ↔ CoTi2 + β-Ti | experimental | [2] Yang 2022 | Table 3, p. 5, row 8; `ORC-ICNAUQEIQ2` |  |
| Phase transition | 1321 K | 1321 | other: A3 | experimental | [2] Yang 2022 | Table 3, p. 5, row 5; `ORC-LM36FMCLEO` |  |
| Phase transition | 1322 K | 1322 | peritectic: liquid + CoTi ↔ CoTi2 | experimental | [2] Yang 2022 | Table 3, p. 5, row 2; `ORC-5KF5SKTMVQ` |  |
| Phase transition | 1323 K | 1323 | L ? CoTi CoTi2 | experimental | [3] Turchanin 2024 | p. 3; `ORC-OFULSHYG67.73ae90` | “The temperatures of three invariant reactions of L ? CoTi CoTi2, L CoTi2 ? (bTi), and (bTi) CoTi2 ? (aTi) were determined to be 1323, 1302, and 964 K, respectively.” |
| Phase transition | 1323 K | 1323 | peritectic: liquid + CoTi ↔ CoTi2 | experimental | [2] Yang 2022 | Table 3, p. 5, row 1; `ORC-DB4IKD4NR4` |  |
| Phase transition | 1388 K | 1388 | magnetic | model | [3] Turchanin 2024; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | p. 2; `ORC-5NXFZH4LBL.bf82c8` | “The TC decreases from 1388 K for a pure Co sample to a constant temperature of 1121 ± 1 K within the two-phase region (aCo) ? TiCo3 at 7.3-16.9 at.% Ti.” |
| Phase transition | 1427 K | 1427 | L Co3Ti ? C36 | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | p. 2; `ORC-X2NZ6BORXY.6d4c71` | “Two invariant reactions with participation of the Co3Ti phase were reported: L ? (aCo) Co3Ti at 1429 K and L Co3Ti ? C36 at 1427 K.” |
| Phase transition | 1429 K | 1429 | L ? (aCo) Co3Ti | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | p. 2; `ORC-X2NZ6BORXY.d817e3` | “Two invariant reactions with participation of the Co3Ti phase were reported: L ? (aCo) Co3Ti at 1429 K and L Co3Ti ? C36 at 1427 K.” |
| Phase transition | 1429 K | 1429 | liquid ? aCo ? Co3Ti | experimental | [2] Yang 2022 | p. 2; `ORC-CKXX5CD4IV.1482f9` | “The temperatures of two invariant reactions liquid ? aCo ? Co3Ti and b-Ti ? CoTi2 ? a-Ti were 1429 and 967 K with an accuracy of ± 3 K.” |
| Phase transition | 1454 K | 1454 | Liquid = L12; _L: Ti 0.203; L12: Ti 0.203_ | model | [4] Davydov 2001 | Table VI, p. 11, row 18; `ORC-G4K7BOB7QA` |  |
| Phase transition | 1524 K | 1524 | liquid ? CoTi ? b-Co2Ti | experimental | [2] Yang 2022 | p. 2; `ORC-ULBUF5DOY2` | “The temperatures of four invariant reactions of liquid ? a-Co ? Co3Ti, liquid ? c-Co2Ti ? Co3Ti, liquid ? b-Co2Ti ? c-Co2Ti and liquid ? CoTi ? b-Co2Ti were confirmed to be 1428 ± 2, 1431 ± 2, 1496 ± 3 and 1524 ± 2 K.” |
| Phase transition | 1598 K | 1598 | Liquid = B2; _L: Ti 0.5; B2: Ti 0.5_ | model | [4] Davydov 2001; _cites Murray 1987_ [doi](https://doi.org/10.1007/bf02873414) | Table VI, p. 11, row 10; `ORC-23FO37O5MF` |  |
| Phase transition | 1731 K | 1731 | other: I DTA Cooling Tpeak; _alloy: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 4; `ORC-RLDA6GSU4C` |  |
| Phase transition | 1732 K | 1732 | other: I Summary TS; _alloy: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 7; `ORC-ZMXCARRAF3` |  |
| Phase transition | 1733 K | 1733 | other: I DTA Heating Tonset; _alloy: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 1; `ORC-DJDWNWETAL` |  |
| Phase transition | 1733 K | 1733 | other: I VOM Tfirst melt; _alloy: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 8; `ORC-NELZ4W2GRQ` |  |
| Phase transition | 1733 K | 1733 | other: II VOM Tfirst melt; _alloy: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 17; `ORC-V2HW6VLBDI` |  |
| Phase transition | 1733 K | 1733 | other: III VOM Tfirst melt; _alloy: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 26; `ORC-KPJKBETXT3` |  |
| Phase transition | 1739 K | 1739 | other: II DTA Cooling Tpeak; _alloy: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 13; `ORC-RB4GYP7BXF` |  |
| Phase transition | 1739 K | 1739 | other: II DTA Heating Tonset; _alloy: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 10; `ORC-PCJVXDKJDI` |  |
| Phase transition | 1739 K | 1739 | other: II Summary TS; _alloy: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 16; `ORC-COQPAIWUGC` |  |
| Phase transition | 1739 K | 1739 | other: III DTA Cooling Tpeak; _alloy: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 22; `ORC-G3H3A6NFU7` |  |
| Phase transition | 1740 K | 1740 | other: III Summary TS; _alloy: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 25; `ORC-J5QOXPCNKM` |  |
| Phase transition | 1741 K | 1741 | other: III DTA Heating Tonset; _alloy: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 19; `ORC-TKKR2YGXOY` |  |
| Phase transition | 1753 K | 1753 | other: I VOM Tcollapse; _alloy: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 9; `ORC-W6OUP2KPBV` |  |
| Phase transition | 1753 K | 1753 | other: II VOM Tcollapse; _alloy: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 18; `ORC-7PUALCSDQU` |  |
| Phase transition | 1753 K | 1753 | other: III VOM Tcollapse; _alloy: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 27; `ORC-UXA2LDHHZD` |  |
| Phase transition | 1758 K | 1758 | other: I DTA Cooling Tonset; _alloy: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 3; `ORC-R5E6VL4TXF` |  |
| Phase transition | 1761 K | 1761 | other: II DTA Cooling Tonset; _alloy: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 12; `ORC-4HCSCI6UGC` |  |
| Phase transition | 1763 K | 1763 | other: III DTA Cooling Tonset; _alloy: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 21; `ORC-IUDK5SFHYL` |  |
| Phase transition | 1768 K | 1768 | L ⇄ CoTi; _L: Ti 0.497; CoTi: Ti 0.497_ | model | [3] Turchanin 2024; _cites Wu 2020_ [doi](https://doi.org/10.1016/j.jct.2019.105995) | Table 3, p. 9, row 48; `ORC-GMVO2MOUE3` |  |
| Phase transition | 1773 K | 1773 | L ⇄ CoTi; _L: Ti 0.498; CoTi: Ti 0.498_ | model | [3] Turchanin 2024; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 3, p. 9, row 47; `ORC-L5G2A7JYTS` |  |
| Phase transition | 1773 K | 1773 | Liquid = B2; _L: Ti 0.498; B2: Ti 0.498_ | model | [4] Davydov 2001 | Table VI, p. 11, row 8; `ORC-JQXFD7BGAO` |  |
| Phase transition | 1773 K | 1773 | other | model | [3] Turchanin 2024 | p. 8; `ORC-EZBJ6CYSPX` | “According to the results of our calculations, the melting temperature of the CoTi phase is 1773 K, which is very consistent with the data\[6,18\] given the significant scatter of experimental points for the liquidus of this phase.” |
| Phase transition | 1774 K | 1774 | Liquid = B2; _L: Ti 0.502; B2: Ti 0.502_ | model | [4] Davydov 2001 | Table VI, p. 11, row 9; `ORC-G4YGCXYYAU` |  |
| Phase transition | 1774 K | 1774 | other: I DTA Heating Tpeak; _alloy: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 2; `ORC-S4G2TWKPQB` |  |
| Phase transition | 1775 K | 1775 | other: II DTA Heating Tpeak; _alloy: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 11; `ORC-VVNGBHOZEC` |  |
| Phase transition | 1776 K | 1776 | L ⇄ CoTi; _L: Ti 0.504; CoTi: Ti 0.504_ | experimental | [3] Turchanin 2024; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | Table 3, p. 9, row 45; `ORC-RY5H7KYYFX` |  |
| Phase transition | 1776 K | 1776 | congruent melting | experimental | [2] Yang 2022; _cites Davydov 2001_ [doi](https://doi.org/10.1007/s11661-001-0193-8) | p. 2; `ORC-YYMODAENBT` | “After that, Davydov et al. \[23\] measured the congruent melting temperature of CoTi as 1776 K with an accuracy of ± 5 K by combination of visual observation of melting (VOM) and differential thermal analysis (DTA).” |
| Phase transition | 1776 K | 1776 | other: III DTA Heating Tpeak; _alloy: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 20; `ORC-N56BQJDCYT` |  |
| Phase transition | 1778 K | 1778 | L ⇄ CoTi; _L: Ti 0.5; CoTi: Ti 0.5_ | experimental | [3] Turchanin 2024; _cites Stein 2019_ [doi](https://doi.org/10.1016/j.calphad.2019.101681) | Table 3, p. 9, row 46; `ORC-R5HNWXTZNB` |  |
| Phase transition | 1778 K | 1778 | congruent melting | experimental | [2] Yang 2022 | p. 2; `ORC-UKBXMTSCAK` | “The congruent melting temperature of CoTi was determined as 1778 ± 5 K, which was consistent with the previous value \[23\].” |
| Phase transition | 1778 K | 1778 | congruent transformation | experimental | [3] Turchanin 2024 | p. 2; `ORC-W6JELWO32C` | “The congruent melting temperature of the CoTi was determined as 1778 ± 5 K, which is in very good agreement with the value presented by Davydov et al.\[18\]” |
| Phase transition | 1793 K | 1793 | L ⇄ CoTi; _L: Ti 0.493; CoTi: Ti 0.493_ | experimental | [3] Turchanin 2024; _cites Petkov 1971_ | Table 3, p. 9, row 44; `ORC-A7TPQBIANK` |  |

### Phase equilibrium (29)

Table: Phase equilibrium, Co–Ti system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase assemblage |  |  | B2 + C15; _alloy: Co 0.65, Ti 0.35_ | experimental | [1] Wu 2020 | Table 9, p. 11, row 6; `ORC-HBPHYUHEH7` |  |
| Phase assemblage |  |  | B2 + C15; _alloy: Co 0.65, Ti 0.35_ | unspecified | [1] Wu 2020 | Table 9, p. 11, row 5; `ORC-IV2B3VV5H2` |  |
| Phase assemblage |  |  | C36 + L1₂; _alloy: Co 0.76, Ti 0.24_ | experimental | [1] Wu 2020 | Table 9, p. 11, row 2; `ORC-3HPXAIPMS6` |  |
| Phase assemblage |  |  | C36 + L1₂; _alloy: Co 0.76, Ti 0.24_ | unspecified | [1] Wu 2020 | Table 9, p. 11, row 1; `ORC-GL4IRLZO36` |  |
| Phase assemblage |  |  | E9₃ + A2(βTi); _alloy: Co 0.24, Ti 0.76_ | experimental | [1] Wu 2020 | Table 9, p. 11, row 10; `ORC-IMUVUL7DXM` |  |
| Phase assemblage |  |  | E9₃ + A2(βTi); _alloy: Co 0.24, Ti 0.76_ | unspecified | [1] Wu 2020 | Table 9, p. 11, row 9; `ORC-RF42CK2UVH` |  |
| Phase composition |  | 1173.15 | A1(αCo) + L1₂ + L12; _A1(αCo): Co 0.896, Ti 0.104; L1₂: Co 0.787, Ti 0.213; L12: Co 0.787, Ti 0.213_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 2; `ORC-DMICAHBKFE` |  |
| Phase composition |  | 1173.15 | A1(αCo) + L1₂ + L12; _A1(αCo): Co 0.902, Ti 0.098; L1₂: Co 0.794, Ti 0.206; L12: Co 0.794, Ti 0.206_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 1; `ORC-UOGNRNCQ7V` |  |
| Phase composition |  | 1173.15 | B2 + E9₃ + E93; _B2: Co 0.483, Ti 0.517; E9₃: Co 0.324, Ti 0.676; E93: Co 0.324, Ti 0.676_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 7; `ORC-6HXMPK4CTS` |  |
| Phase composition |  | 1173.15 | L1₂ + C36 + L12; _L1₂: Co 0.744, Ti 0.256; L12: Co 0.744, Ti 0.256; C36: Co 0.693, Ti 0.307_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 4; `ORC-EFAXJUPXJJ` |  |
| Phase composition |  | 1223 | CoTi + CoTi2; _CoTi: Co 0.496, Ti 0.504; CoTi2: Co 0.3261, Ti 0.6739_ | experimental | [2] Yang 2022 | Table 2, p. 4, row 5; `ORC-DE7Y3RNIWO` |  |
| Phase composition |  | 1223 | CoTi + CoTi2; _CoTi: Co 0.4985, Ti 0.5015; CoTi2: Co 0.3306, Ti 0.6694_ | experimental | [2] Yang 2022 | Table 2, p. 4, row 1; `ORC-YC7HYXIVRK` |  |
| Phase composition |  | 1223 | CoTi2 + β-Ti; _CoTi2: Co 0.328, Ti 0.672; β-Ti: Co 0.0996, Ti 0.9004_ | experimental | [2] Yang 2022 | Table 2, p. 4, row 2; `ORC-AZS4T3NXFT` |  |
| Phase composition |  | 1223 | CoTi2 + β-Ti; _CoTi2: Co 0.3291, Ti 0.6709; β-Ti: Co 0.1186, Ti 0.8814_ | experimental | [2] Yang 2022 | Table 2, p. 4, row 8; `ORC-BQOQ4HFQPO` |  |
| Phase composition |  | 1223 | CoTi2 + β-Ti; _CoTi2: Co 0.3238, Ti 0.6762; β-Ti: Co 0.0977, Ti 0.9023_ | experimental | [2] Yang 2022 | Table 2, p. 4, row 3; `ORC-CRQ7RQFBQY` |  |
| Phase composition |  | 1223 | CoTi2 + β-Ti; _CoTi2: Co 0.3232, Ti 0.6768; β-Ti: Co 0.1173, Ti 0.8827_ | experimental | [2] Yang 2022 | Table 2, p. 4, row 6; `ORC-FEANJEGC33` |  |
| Phase composition |  | 1223 | CoTi2 + β-Ti; _CoTi2: Co 0.3222, Ti 0.6778; β-Ti: Co 0.0994, Ti 0.9006_ | experimental | [2] Yang 2022 | Table 2, p. 4, row 4; `ORC-I3NBPOCAP5` |  |
| Phase composition |  | 1223 | CoTi2 + β-Ti; _CoTi2: Co 0.3246, Ti 0.6754; β-Ti: Co 0.1213, Ti 0.8787_ | experimental | [2] Yang 2022 | Table 2, p. 4, row 7; `ORC-PPFDJJ7Z26` |  |
| Phase composition |  | 1273.15 | C15 + B2; _C15: Co 0.651, Ti 0.349; B2: Co 0.534, Ti 0.466_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 6; `ORC-Y2ZE5ONTEI` |  |
| Phase composition |  | 1273.15 | C36 + C15; _C36: Co 0.688, Ti 0.312; C15: Co 0.668, Ti 0.332_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 5; `ORC-IFMDJZARYY` |  |
| Phase composition |  | 1273.15 | E9₃ + A2(βTi) + E93; _E9₃: Co 0.353, Ti 0.647; E93: Co 0.353, Ti 0.647; A2(βTi): Co 0.077, Ti 0.923_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 8; `ORC-AB6LJOR6QH` |  |
| Phase composition |  | 1273.15 | E9₃ + A2(βTi) + E93; _E9₃: Co 0.321, Ti 0.679; E93: Co 0.321, Ti 0.679; A2(βTi): Co 0.104, Ti 0.896_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 9; `ORC-LQQSH6NAFT` |  |
| Phase composition |  | 1273.15 | L1₂ + C36 + L12; _L1₂: Co 0.744, Ti 0.256; L12: Co 0.744, Ti 0.256; C36: Co 0.694, Ti 0.306_ | experimental | [1] Wu 2020 | Table 3, p. 5, row 3; `ORC-IJ57G767HV` |  |
| Phase composition |  | 1766 | other: I Summary TL; _liquid: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 5; `ORC-KCMZXOE4WW` |  |
| Phase composition |  | 1768 | other: II Summary TL; _liquid: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 14; `ORC-CDK2COGPFC` |  |
| Phase composition |  | 1769.5 | other: III Summary TL; _liquid: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 23; `ORC-3IX53XRTR6` |  |
| Phase composition |  | 1774 | other: I Summary TL (used for optimization); _liquid: Co 0.519, Ti 0.481_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 6; `ORC-FCKC2CEC7V` |  |
| Phase composition |  | 1775 | other: II Summary TL (used for optimization); _liquid: Co 0.506, Ti 0.494_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 15; `ORC-OOAN7ZJ5J6` |  |
| Phase composition |  | 1776 | other: III Summary TL (used for optimization); _liquid: Co 0.496, Ti 0.504_ | experimental | [4] Davydov 2001 | Table II, p. 3, row 24; `ORC-CVWZR4NBAK` |  |

### Formation (5)

Table: Formation, Co–Ti system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Entropy of formation; _printed: ΔfS298_ | -2.6 J/mol-atom/K | 298.15 | B2; _alloy: Co 0.5, Ti 0.5_ | model | [4] Davydov 2001 | Table V, p. 10, row 4; `ORC-YFY7FGZI74.74d6f3` |  |
| Entropy of formation; _printed: ΔfS298_ | 1 J/mol-atom/K | 298.15 | C15; _alloy: Co 0.67, Ti 0.33_ | model | [4] Davydov 2001 | Table V, p. 10, row 3; `ORC-H5XJE3WQ3B.f61585` |  |
| Entropy of formation; _printed: ΔfS298_ | 1.3 J/mol-atom/K | 298.15 | C36; _alloy: Co 0.69, Ti 0.31_ | model | [4] Davydov 2001 | Table V, p. 10, row 2; `ORC-4P6ZI6VCXK.35a900` |  |
| Entropy of formation; _printed: ΔfS298_ | -4.7 J/mol-atom/K | 298.15 | CoTi2; _alloy: Co 0.33, Ti 0.67_ | model | [4] Davydov 2001 | Table V, p. 10, row 5; `ORC-QJ72ZIOZW5.0c0120` |  |
| Entropy of formation; _printed: ΔfS298_ | 2.3 J/mol-atom/K | 298.15 | L12; _alloy: Co 0.76, Ti 0.24_ | model | [4] Davydov 2001 | Table V, p. 10, row 1; `ORC-BA3RFQJPHI.d6bcab` |  |

### Mixing / partial (2)

Table: Mixing / partial, Co–Ti system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Enthalpy of mixing; _printed: DmH_ | -33.3 kJ/mol (basis unstated) | 1873 |  | model | [3] Turchanin 2024 | p. 8; `ORC-C267KN4GRX` | “The mixing enthalpy of the liquid Co-Ti alloys calculated at 1873 K is shown in Fig. 1(a) and shows satisfactory agreement with calorimetric data.\[19-21\] The minimum value of the mixing enthalpy is DmH = - 33.3 kJ/mol at xTi = 0.47.” |
| Enthalpy of mixing; _printed: integral mixing enthalpy_ | -50.5 kJ/mol (basis unstated) | 1873 |  | experimental | [3] Turchanin 2024; _cites Ueda 1986_ [doi](https://doi.org/10.2320/jinstmet1952.50.12_1081) | p. 3; `ORC-Z6NCDS62FD` | “As an example, the minimum value of the integral mixing enthalpy of - 50.5 kJ/mol at xTi = 0.52 and 1873 K was reported in Ref \[22\], which contradicts the results of direct calorimetric measurements.\[19-21\]” |

### Crystal structure (8)

Table: Crystal structure, Co–Ti system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 6.716 Å | 298.15 | Co2Ti (c); _alloy: Ti 0.333333_ | experimental | [5] Cacciamani 2000; _cites Pet'kov 1971_ | Table 1, p. 2, row 4; `ORC-6TUGCJBTTB` |  |
| Lattice a | 4.732 Å | 298.15 | Co2Ti (h); _alloy: Ti 0.333333_ | experimental | [5] Cacciamani 2000; _cites Pet'kov 1971_ | Table 1, p. 2, row 5; `ORC-AQJICJ25MR.ecddc8` |  |
| Lattice a | 3.618 Å | 298.15 | Co3Ti; _alloy: Ti 0.25_ | experimental | [5] Cacciamani 2000; _cites Pet'kov 1971_ | Table 1, p. 2, row 3; `ORC-G2RORCSBLI.30e3cd` |  |
| Lattice a | 3.603 Å | 298.15 | Co3Ti; _alloy: Ti 0.25_ | experimental | [5] Cacciamani 2000; _cites Pet'kov 1971_ | Table 1, p. 2, row 3; `ORC-G2RORCSBLI.f00a71` |  |
| Lattice a | 2.988 Å | 298.15 | CoTi; _alloy: Ti 0.5_ | experimental | [5] Cacciamani 2000; _cites Pet'kov 1971_ | Table 1, p. 2, row 6; `ORC-RQLHLTKVO4.4e61c4` |  |
| Lattice a | 2.996 Å | 298.15 | CoTi; _alloy: Ti 0.5_ | experimental | [5] Cacciamani 2000; _cites Pet'kov 1971_ | Table 1, p. 2, row 6; `ORC-RQLHLTKVO4.ddc563` |  |
| Lattice a | 11.3 Å | 298.15 | CoTi2; _alloy: Ti 0.666667_ | experimental | [5] Cacciamani 2000; _cites Pet'kov 1971_ | Table 1, p. 2, row 7; `ORC-2KHVVOQBSE` |  |
| Lattice c | 15.427 Å | 298.15 | Co2Ti (h); _alloy: Ti 0.333333_ | experimental | [5] Cacciamani 2000; _cites Pet'kov 1971_ | Table 1, p. 2, row 5; `ORC-AQJICJ25MR.2f480a` |  |

## Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

1. Liying Wu, Yinping Zeng, Yafei Pan, Yong Du, Yingbiao Peng, Han Li et al., Thermodynamic description and simulation of solidification microstructure in the Co-Ti system, The Journal of Chemical Thermodynamics 142, 105995 (2020). [doi:10.1016/j.jct.2019.105995](https://doi.org/10.1016/j.jct.2019.105995)
2. Hua-kou Yang, Chen-yang Zhou, Hang Wang, Bin Yang, Phase equilibria in Ti-rich portion and thermodynamic re-optimization of Co–Ti system, J. Iron Steel Res. Int. 29, 914-924 (2022). [doi:10.1007/s42243-021-00736-6](https://doi.org/10.1007/s42243-021-00736-6)
3. Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024). [doi:10.1007/s11669-024-01094-y](https://doi.org/10.1007/s11669-024-01094-y)
4. A. V. Davydov, U. R. Kattner, D. Josell, R. M. Waterstrat, W. J. Boettinger, J. E. Blendell et al., Determination of the CoTi congruent melting point and thermodynamic reassessment of the Co-Ti system, Metall Mater Trans A 32, 2175-2186 (2001). [doi:10.1007/s11661-001-0193-8](https://doi.org/10.1007/s11661-001-0193-8)
5. G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Thermodynamic modelling of the Co–Ti system, Intermetallics 8, 213-222 (2000). [doi:10.1016/s0966-9795(99)00098-9](https://doi.org/10.1016/s0966-9795%2899%2900098-9)

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735569
- R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859
- R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735891
- R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065

Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0).

Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

```bibtex
@misc{orchid_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).