# Mo–Ti phases

> Mo–Ti system: 13 phases (tier A 4, tier C 3, liquid 1, needs_review 5); 11 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

HTML: https://data.orchid-project.org/phases/pages/MO-TI.html · Markdown: https://data.orchid-project.org/phases/pages/MO-TI.md

13 phases (tier A 4, tier C 3, liquid 1, needs_review 5); 11 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: [interactive registry](https://orchid-project.org/phases/?q=MO-TI) · [full JSON](https://data.orchid-project.org/phases/systems/MO-TI.json) · [Mo–Ti system page](https://data.orchid-project.org/systems/MO-TI.html) · [Markdown](https://data.orchid-project.org/phases/pages/MO-TI.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Mo–Ti system (13)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [BCC_A2](#phase-mo-ti-bcc-a2); _phase:mo-ti:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 8 of 8 calculated diagram(s): 300–2947.24 K, x(Ti) 0–1 | 2 | 8 |
| [OMEGA_C32](#phase-mo-ti-c32-omega); _phase:mo-ti:c32-omega_ | AlB2 · C32 · hP3 · P6/mmm (191) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 |
| [FCC_A1](#phase-mo-ti-fcc-a1); _phase:mo-ti:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | not stable in 8 calculated diagram(s) | 0 | 8 |
| [HCP_A3](#phase-mo-ti-hcp-a3); _phase:mo-ti:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 8 of 8 calculated diagram(s): 300–2895 K, x(Ti) 0.497–1 | 2 | 8 |
| [LIQUID](#phase-mo-ti-liquid); _phase:mo-ti:liquid_ | liquid | liquid | stable in 8 of 8 calculated diagram(s): 300.96–4000 K, x(Ti) 0–1 | 0 | 8 |
| [MO2TI](#phase-mo-ti-mo2ti); _phase:mo-ti:mo2ti_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–700.64 K, x(Ti) 0.33333–0.33333 | 0 | 1 |
| [MO3TI2](#phase-mo-ti-mo3ti2); _phase:mo-ti:mo3ti2_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–730 K, x(Ti) 0.4–0.4 | 0 | 1 |
| [MO4TI](#phase-mo-ti-mo4ti); _phase:mo-ti:mo4ti_ | (Mo4Ti) · hR5 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–738.37 K, x(Ti) 0.2–0.2 | 0 | 1 |
| [MO5TI](#phase-mo-ti-mo5ti); _phase:mo-ti:mo5ti_ | (Mo5Ti) · oC12 · Cmmm (65) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–647.18 K, x(Ti) 0.16667–0.16667 | 0 | 1 |
| [MO7TI](#phase-mo-ti-mo7ti); _phase:mo-ti:mo7ti_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–523.24 K, x(Ti) 0.125–0.125 | 0 | 1 |
| [MO9TI](#phase-mo-ti-mo9ti); _phase:mo-ti:mo9ti_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–314.18 K, x(Ti) 0.1–0.1 | 0 | 1 |
| [MOTI](#phase-mo-ti-moti); _phase:mo-ti:moti_ | (MoTi) · hR8 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–732.9 K, x(Ti) 0.5–0.5 | 0 | 1 |
| [MOTI2](#phase-mo-ti-moti2); _phase:mo-ti:moti2_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–865.54 K, x(Ti) 0.66667–0.66667 | 0 | 1 |

## BCC_A2 (Mo–Ti)

- Id: `phase:mo-ti:bcc-a2`; status `assigned`
- Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high
- Stability: stable in 8 of 8 calculated diagram(s): 300–2947.24 K, x(Ti) 0–1
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:bcc-a2)

Names (10): _corpus: _corpus:phase:mo-ti:bcc-a2  
_paper: _paper:10.1007/s11663-996-0009-8:bcc(2)  
_tdb: _tdb:MoTi-16Yan.tdb:BCC_A2, tdb:MoTi-18Hu.tdb:BCC_A2, tdb:MoTi-20Jia.tdb:BCC_A2, tdb:MoTi-23Dac.tdb:BCC_A2, tdb:MoTi-93Jin.tdb:BCC_A2, tdb:MoTi-96Shi.tdb:BCC_A2, tdb:MoTi-98Sau-LB.tdb:BCC_A2, tdb:MoTi-99Chu.tdb:BCC_A2  


### TDB models of BCC_A2 (8): PHASE and CONSTITUENT statements as written

[MoTi-16Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-16Yan.tdb): BCC_A2, type code %B, sha256 `99cf8bc3e542cda7…`

~~~~text
35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : MO TI : VA : !
~~~~

[MoTi-18Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-18Hu.tdb): BCC_A2, type code %B, sha256 `d5f576e402a6c470…`

~~~~text
31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : MO TI : VA : !
~~~~

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): BCC_A2, type code %B, sha256 `d8cb5a83578640f5…`

~~~~text
31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : MO TI : VA : !
~~~~

[MoTi-23Dac.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-23Dac.tdb): BCC_A2, type code %B, sha256 `04ec486753053de8…`

~~~~text
32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : MO TI : VA : !
~~~~

[MoTi-93Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-93Jin.tdb): BCC_A2, type code %B, sha256 `8071078bb74b3de2…`

~~~~text
29: PHASE BCC_A2 %B 2 1 3 !
30: CONST BCC_A2 : MO TI : VA : !
~~~~

[MoTi-96Shi.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-96Shi.tdb): BCC_A2, type code %B, sha256 `81beb468857dd70e…`

~~~~text
30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : MO TI : VA : !
~~~~

[MoTi-98Sau-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-98Sau-LB.tdb): BCC_A2, type code %B, sha256 `69c921b92002fbea…`

~~~~text
30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : MO TI : VA : !
~~~~

[MoTi-99Chu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-99Chu.tdb): BCC_A2, type code %B, sha256 `16a2cd8f1115c9e4…`

~~~~text
30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : MO TI : VA : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1007/s11663-996-0009-8](https://doi.org/10.1007/s11663-996-0009-8) Jae-Hyeok Shim, Chang-Seok Oh, Dong Nyung Lee, A thermodynamic evaluation of the Ti-Mo-C system, Metall Mater Trans B 27, 955-966 (1996).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/BF02648587](https://doi.org/10.1007/BF02648587) Z.-P. Jin, C. Qiu, Metall. Trans. A, 24A, 2137-44(1993).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2018.05.007](https://doi.org/10.1016/j.calphad.2018.05.007) B. Hu, Y. Jiang, J. Wang, B. Yao, F. Min, Y. Du, Calphad, 62, 75-82(2018).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2016.02.251](https://doi.org/10.1016/j.jallcom.2016.02.251) Jia-Yi Yan, G.B. Olson, Computational thermodynamics and kinetics of displacive transformations in titanium-based alloys, Journal of Alloys and Compounds 673, 441-454 (2016).  
_assessment that models this phase_
- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_
- [doi:10.1016/S0925-8388(98)00711-7](https://doi.org/10.1016/S0925-8388%2898%2900711-7) H.-J. Chung, J.-H. Shim, D.N. Lee, J. Alloys Compd., 282, 142-48(1999).  
_assessment that models this phase_
- [doi:10.2298/JMMB210330011D](https://doi.org/10.2298/JMMB210330011D) R.A. Daclan, M.G. Mena, M.R. Vazquez, W. Gierlotka, J. Mining Metall. B, 59, 125-36(2023).  
_assessment that models this phase_

## OMEGA_C32 (Mo–Ti)

- Id: `phase:mo-ti:c32-omega`; status `assigned`
- Structure: AlB2 · C32 · hP3 · P6/mmm (191); type `st:c32-alb2-hp3`; tier A: standard phase name; confidence high
- Stability: not stable in 2 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:c32-omega)

Names (3): _corpus: _corpus:phase:mo-ti:c32-omega  
_tdb: _tdb:MoTi-16Yan.tdb:OMEGA_C32, tdb:MoTi-18Hu.tdb:OMEGA_C32  


### TDB models of OMEGA_C32 (2): PHASE and CONSTITUENT statements as written

[MoTi-16Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-16Yan.tdb): OMEGA_C32, type code %, sha256 `99cf8bc3e542cda7…`

~~~~text
45: PHASE OMEGA_C32 % 1 1 !
46: CONST OMEGA_C32 : MO TI : !
~~~~

[MoTi-18Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-18Hu.tdb): OMEGA_C32, type code %, sha256 `d5f576e402a6c470…`

~~~~text
41: PHASE OMEGA_C32 % 1 1 !
42: CONST OMEGA_C32 : MO TI : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.calphad.2018.05.007](https://doi.org/10.1016/j.calphad.2018.05.007) B. Hu, Y. Jiang, J. Wang, B. Yao, F. Min, Y. Du, Calphad, 62, 75-82(2018).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2016.02.251](https://doi.org/10.1016/j.jallcom.2016.02.251) Jia-Yi Yan, G.B. Olson, Computational thermodynamics and kinetics of displacive transformations in titanium-based alloys, Journal of Alloys and Compounds 673, 441-454 (2016).  
_assessment that models this phase_

## FCC_A1 (Mo–Ti)

- Id: `phase:mo-ti:fcc-a1`; status `assigned`
- Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high
- Stability: not stable in 8 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:fcc-a1)

Names (9): _corpus: _corpus:phase:mo-ti:fcc-a1  
_tdb: _tdb:MoTi-16Yan.tdb:FCC_A1, tdb:MoTi-18Hu.tdb:FCC_A1, tdb:MoTi-20Jia.tdb:FCC_A1, tdb:MoTi-23Dac.tdb:FCC_A1, tdb:MoTi-93Jin.tdb:FCC_A1, tdb:MoTi-96Shi.tdb:FCC_A1, tdb:MoTi-98Sau-LB.tdb:FCC_A1, tdb:MoTi-99Chu.tdb:FCC_A1  


### TDB models of FCC_A1 (8): PHASE and CONSTITUENT statements as written

[MoTi-16Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-16Yan.tdb): FCC_A1, type code %A, sha256 `99cf8bc3e542cda7…`

~~~~text
30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : MO TI : VA : !
~~~~

[MoTi-18Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-18Hu.tdb): FCC_A1, type code %A, sha256 `d5f576e402a6c470…`

~~~~text
26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : MO TI : VA : !
~~~~

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): FCC_A1, type code %A, sha256 `d8cb5a83578640f5…`

~~~~text
26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : MO TI : VA : !
~~~~

[MoTi-23Dac.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-23Dac.tdb): FCC_A1, type code %A, sha256 `04ec486753053de8…`

~~~~text
27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : MO TI : VA : !
~~~~

[MoTi-93Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-93Jin.tdb): FCC_A1, type code %A, sha256 `8071078bb74b3de2…`

~~~~text
24: PHASE FCC_A1 %A 2 1 1 !
25: CONST FCC_A1 : MO TI : VA : !
~~~~

[MoTi-96Shi.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-96Shi.tdb): FCC_A1, type code %A, sha256 `81beb468857dd70e…`

~~~~text
25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : MO TI : VA : !
~~~~

[MoTi-98Sau-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-98Sau-LB.tdb): FCC_A1, type code %A, sha256 `69c921b92002fbea…`

~~~~text
25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : MO TI : VA : !
~~~~

[MoTi-99Chu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-99Chu.tdb): FCC_A1, type code %A, sha256 `16a2cd8f1115c9e4…`

~~~~text
25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : MO TI : VA : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1007/BF02648587](https://doi.org/10.1007/BF02648587) Z.-P. Jin, C. Qiu, Metall. Trans. A, 24A, 2137-44(1993).  
_assessment that models this phase_
- [doi:10.1007/s11663-996-0009-8](https://doi.org/10.1007/s11663-996-0009-8) Jae-Hyeok Shim, Chang-Seok Oh, Dong Nyung Lee, A thermodynamic evaluation of the Ti-Mo-C system, Metall Mater Trans B 27, 955-966 (1996).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2018.05.007](https://doi.org/10.1016/j.calphad.2018.05.007) B. Hu, Y. Jiang, J. Wang, B. Yao, F. Min, Y. Du, Calphad, 62, 75-82(2018).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2016.02.251](https://doi.org/10.1016/j.jallcom.2016.02.251) Jia-Yi Yan, G.B. Olson, Computational thermodynamics and kinetics of displacive transformations in titanium-based alloys, Journal of Alloys and Compounds 673, 441-454 (2016).  
_assessment that models this phase_
- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_
- [doi:10.1016/S0925-8388(98)00711-7](https://doi.org/10.1016/S0925-8388%2898%2900711-7) H.-J. Chung, J.-H. Shim, D.N. Lee, J. Alloys Compd., 282, 142-48(1999).  
_assessment that models this phase_
- [doi:10.2298/JMMB210330011D](https://doi.org/10.2298/JMMB210330011D) R.A. Daclan, M.G. Mena, M.R. Vazquez, W. Gierlotka, J. Mining Metall. B, 59, 125-36(2023).  
_assessment that models this phase_

## HCP_A3 (Mo–Ti)

- Id: `phase:mo-ti:hcp-a3`; status `assigned`
- Structure: Mg · A3 · hP2 · P6_3/mmc (194); type `st:a3-mg-hp2`; tier A: standard phase name; confidence high
- Stability: stable in 8 of 8 calculated diagram(s): 300–2895 K, x(Ti) 0.497–1
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:hcp-a3)

Names (10): _corpus: _corpus:phase:mo-ti:hcp-a3  
_paper: _paper:10.1007/s11663-996-0009-8:hcp  
_tdb: _tdb:MoTi-16Yan.tdb:HCP_A3, tdb:MoTi-18Hu.tdb:HCP_A3, tdb:MoTi-20Jia.tdb:HCP_A3, tdb:MoTi-23Dac.tdb:HCP_A3, tdb:MoTi-93Jin.tdb:HCP_A3, tdb:MoTi-96Shi.tdb:HCP_A3, tdb:MoTi-98Sau-LB.tdb:HCP_A3, tdb:MoTi-99Chu.tdb:HCP_A3  


### TDB models of HCP_A3 (8): PHASE and CONSTITUENT statements as written

[MoTi-16Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-16Yan.tdb): HCP_A3, type code %A, sha256 `99cf8bc3e542cda7…`

~~~~text
40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : MO TI% : VA : !
~~~~

[MoTi-18Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-18Hu.tdb): HCP_A3, type code %A, sha256 `d5f576e402a6c470…`

~~~~text
36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : MO TI% : VA : !
~~~~

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): HCP_A3, type code %A, sha256 `d8cb5a83578640f5…`

~~~~text
36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : MO TI% : VA : !
~~~~

[MoTi-23Dac.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-23Dac.tdb): HCP_A3, type code %A, sha256 `04ec486753053de8…`

~~~~text
37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : MO TI% : VA : !
~~~~

[MoTi-93Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-93Jin.tdb): HCP_A3, type code %A, sha256 `8071078bb74b3de2…`

~~~~text
34: PHASE HCP_A3 %A 2 1 0.5 !
35: CONST HCP_A3 : MO TI% : VA : !
~~~~

[MoTi-96Shi.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-96Shi.tdb): HCP_A3, type code %A, sha256 `81beb468857dd70e…`

~~~~text
35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : MO TI% : VA : !
~~~~

[MoTi-98Sau-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-98Sau-LB.tdb): HCP_A3, type code %A, sha256 `69c921b92002fbea…`

~~~~text
35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : MO TI% : VA : !
~~~~

[MoTi-99Chu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-99Chu.tdb): HCP_A3, type code %A, sha256 `16a2cd8f1115c9e4…`

~~~~text
35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : MO TI% : VA : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1007/s11663-996-0009-8](https://doi.org/10.1007/s11663-996-0009-8) Jae-Hyeok Shim, Chang-Seok Oh, Dong Nyung Lee, A thermodynamic evaluation of the Ti-Mo-C system, Metall Mater Trans B 27, 955-966 (1996).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/BF02648587](https://doi.org/10.1007/BF02648587) Z.-P. Jin, C. Qiu, Metall. Trans. A, 24A, 2137-44(1993).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2018.05.007](https://doi.org/10.1016/j.calphad.2018.05.007) B. Hu, Y. Jiang, J. Wang, B. Yao, F. Min, Y. Du, Calphad, 62, 75-82(2018).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2016.02.251](https://doi.org/10.1016/j.jallcom.2016.02.251) Jia-Yi Yan, G.B. Olson, Computational thermodynamics and kinetics of displacive transformations in titanium-based alloys, Journal of Alloys and Compounds 673, 441-454 (2016).  
_assessment that models this phase_
- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_
- [doi:10.1016/S0925-8388(98)00711-7](https://doi.org/10.1016/S0925-8388%2898%2900711-7) H.-J. Chung, J.-H. Shim, D.N. Lee, J. Alloys Compd., 282, 142-48(1999).  
_assessment that models this phase_
- [doi:10.2298/JMMB210330011D](https://doi.org/10.2298/JMMB210330011D) R.A. Daclan, M.G. Mena, M.R. Vazquez, W. Gierlotka, J. Mining Metall. B, 59, 125-36(2023).  
_assessment that models this phase_

## LIQUID (Mo–Ti)

- Id: `phase:mo-ti:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 8 of 8 calculated diagram(s): 300.96–4000 K, x(Ti) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:liquid)

Names (9): _corpus: _corpus:phase:mo-ti:liquid  
_tdb: _tdb:MoTi-16Yan.tdb:LIQUID, tdb:MoTi-18Hu.tdb:LIQUID, tdb:MoTi-20Jia.tdb:LIQUID, tdb:MoTi-23Dac.tdb:LIQUID, tdb:MoTi-93Jin.tdb:LIQUID, tdb:MoTi-96Shi.tdb:LIQUID, tdb:MoTi-98Sau-LB.tdb:LIQUID, tdb:MoTi-99Chu.tdb:LIQUID  


### TDB models of LIQUID (8): PHASE and CONSTITUENT statements as written

[MoTi-16Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-16Yan.tdb): LIQUID, type code %, sha256 `99cf8bc3e542cda7…`

~~~~text
25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : MO TI : !
~~~~

[MoTi-18Hu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-18Hu.tdb): LIQUID, type code %, sha256 `d5f576e402a6c470…`

~~~~text
21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : MO TI : !
~~~~

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): LIQUID, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : MO TI : !
~~~~

[MoTi-23Dac.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-23Dac.tdb): LIQUID, type code %, sha256 `04ec486753053de8…`

~~~~text
22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : MO TI : !
~~~~

[MoTi-93Jin.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-93Jin.tdb): LIQUID, type code %, sha256 `8071078bb74b3de2…`

~~~~text
19: PHASE LIQUID:L % 1 1 !
20: CONST LIQUID:L : MO TI : !
~~~~

[MoTi-96Shi.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-96Shi.tdb): LIQUID, type code %, sha256 `81beb468857dd70e…`

~~~~text
20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : MO TI : !
~~~~

[MoTi-98Sau-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-98Sau-LB.tdb): LIQUID, type code %, sha256 `69c921b92002fbea…`

~~~~text
20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : MO TI : !
~~~~

[MoTi-99Chu.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-99Chu.tdb): LIQUID, type code %, sha256 `16a2cd8f1115c9e4…`

~~~~text
20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : MO TI : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1007/BF02648587](https://doi.org/10.1007/BF02648587) Z.-P. Jin, C. Qiu, Metall. Trans. A, 24A, 2137-44(1993).  
_assessment that models this phase_
- [doi:10.1007/s11663-996-0009-8](https://doi.org/10.1007/s11663-996-0009-8) Jae-Hyeok Shim, Chang-Seok Oh, Dong Nyung Lee, A thermodynamic evaluation of the Ti-Mo-C system, Metall Mater Trans B 27, 955-966 (1996).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2018.05.007](https://doi.org/10.1016/j.calphad.2018.05.007) B. Hu, Y. Jiang, J. Wang, B. Yao, F. Min, Y. Du, Calphad, 62, 75-82(2018).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2016.02.251](https://doi.org/10.1016/j.jallcom.2016.02.251) Jia-Yi Yan, G.B. Olson, Computational thermodynamics and kinetics of displacive transformations in titanium-based alloys, Journal of Alloys and Compounds 673, 441-454 (2016).  
_assessment that models this phase_
- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_
- [doi:10.1016/S0925-8388(98)00711-7](https://doi.org/10.1016/S0925-8388%2898%2900711-7) H.-J. Chung, J.-H. Shim, D.N. Lee, J. Alloys Compd., 282, 142-48(1999).  
_assessment that models this phase_
- [doi:10.2298/JMMB210330011D](https://doi.org/10.2298/JMMB210330011D) R.A. Daclan, M.G. Mena, M.R. Vazquez, W. Gierlotka, J. Mining Metall. B, 59, 125-36(2023).  
_assessment that models this phase_

## MO2TI (Mo–Ti)

- Id: `phase:mo-ti:mo2ti`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_mp; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (dft_oqmd): I4/mmm (139) — on-hull OQMD Mo2 Ti1 at x(TI)=0.3333
- Candidate (sgte_mmc2): (Mo2Ti) · I4/mmm (139) — Hallstedt 2025 mmc2 row for MO2TI: Mo2Ti
- Candidate (tdb_comment):  — MoTi-20Jia.tdb: 'Prototype unknown (tI\*, I4/mmm)'
- Stoichiometry: Mo 0.6667, Ti 0.3333
- Stability: stable in 1 of 1 calculated diagram(s): 300–700.64 K, x(Ti) 0.33333–0.33333
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:mo2ti)

Names (2): _corpus: _corpus:phase:mo-ti:mo2ti  
_tdb: _tdb:MoTi-20Jia.tdb:MO2TI  


### TDB models of MO2TI (1): PHASE and CONSTITUENT statements as written

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): MO2TI, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
61: PHASE MO2TI % 2 2 1 !
62: CONST MO2TI : MO : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_

## MO3TI2 (Mo–Ti)

- Id: `phase:mo-ti:mo3ti2`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (sgte_mmc2): (Mo3Ti2) · R-3m (166) — Hallstedt 2025 mmc2 row for MO3TI2: Mo3Ti2
- Candidate (tdb_comment):  — MoTi-20Jia.tdb: 'Prototype unknown (hR\*, R-3m)'
- Stoichiometry: Mo 0.6000, Ti 0.4000
- Stability: stable in 1 of 1 calculated diagram(s): 300–730 K, x(Ti) 0.4–0.4
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:mo3ti2)

Names (2): _corpus: _corpus:phase:mo-ti:mo3ti2  
_tdb: _tdb:MoTi-20Jia.tdb:MO3TI2  


### TDB models of MO3TI2 (1): PHASE and CONSTITUENT statements as written

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): MO3TI2, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
66: PHASE MO3TI2 % 2 3 2 !
67: CONST MO3TI2 : MO : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_

## MO4TI (Mo–Ti)

- Id: `phase:mo-ti:mo4ti`; status `assigned`
- Structure: (Mo4Ti) · hR5 · R-3m (166); type `st:mo4ti-hr5`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_mp, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Mo 0.8000, Ti 0.2000
- Stability: stable in 1 of 1 calculated diagram(s): 300–738.37 K, x(Ti) 0.2–0.2
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:mo4ti)

Names (2): _corpus: _corpus:phase:mo-ti:mo4ti  
_tdb: _tdb:MoTi-20Jia.tdb:MO4TI  


### TDB models of MO4TI (1): PHASE and CONSTITUENT statements as written

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): MO4TI, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
56: PHASE MO4TI % 2 4 1 !
57: CONST MO4TI : MO : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_

## MO5TI (Mo–Ti)

- Id: `phase:mo-ti:mo5ti`; status `assigned`
- Structure: (Mo5Ti) · oC12 · Cmmm (65); type `st:mo5ti-oc12`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Mo 0.8333, Ti 0.1667
- Stability: stable in 1 of 1 calculated diagram(s): 300–647.18 K, x(Ti) 0.16667–0.16667
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:mo5ti)

Names (2): _corpus: _corpus:phase:mo-ti:mo5ti  
_tdb: _tdb:MoTi-20Jia.tdb:MO5TI  


### TDB models of MO5TI (1): PHASE and CONSTITUENT statements as written

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): MO5TI, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
51: PHASE MO5TI % 2 5 1 !
52: CONST MO5TI : MO : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_

## MO7TI (Mo–Ti)

- Id: `phase:mo-ti:mo7ti`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_mp; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (dft_oqmd): P4/mmm (123) — on-hull OQMD Mo7 Ti1 at x(TI)=0.1250
- Candidate (sgte_mmc2): (Mo7Ti) · P2/m (10) — Hallstedt 2025 mmc2 row for MO7TI: Mo7Ti
- Candidate (tdb_comment):  — MoTi-20Jia.tdb: 'Prototype unknown (mP\*, P2/m)'
- Stoichiometry: Mo 0.8750, Ti 0.1250
- Stability: stable in 1 of 1 calculated diagram(s): 300–523.24 K, x(Ti) 0.125–0.125
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:mo7ti)

Names (2): _corpus: _corpus:phase:mo-ti:mo7ti  
_tdb: _tdb:MoTi-20Jia.tdb:MO7TI  


### TDB models of MO7TI (1): PHASE and CONSTITUENT statements as written

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): MO7TI, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
46: PHASE MO7TI % 2 7 1 !
47: CONST MO7TI : MO : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_

## MO9TI (Mo–Ti)

- Id: `phase:mo-ti:mo9ti`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (sgte_mmc2): (Mo9Ti) · C2/m (12) — Hallstedt 2025 mmc2 row for MO9TI: Mo9Ti
- Candidate (tdb_comment):  — MoTi-20Jia.tdb: 'Prototype unknown (mC\*, C2/m)'
- Stoichiometry: Mo 0.9000, Ti 0.1000
- Stability: stable in 1 of 1 calculated diagram(s): 300–314.18 K, x(Ti) 0.1–0.1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:mo9ti)

Names (2): _corpus: _corpus:phase:mo-ti:mo9ti  
_tdb: _tdb:MoTi-20Jia.tdb:MO9TI  


### TDB models of MO9TI (1): PHASE and CONSTITUENT statements as written

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): MO9TI, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
41: PHASE MO9TI % 2 9 1 !
42: CONST MO9TI : MO : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_

## MOTI (Mo–Ti)

- Id: `phase:mo-ti:moti`; status `assigned`
- Structure: (MoTi) · hR8 · R-3m (166); type `st:moti-hr8`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Mo 0.5000, Ti 0.5000
- Stability: stable in 1 of 1 calculated diagram(s): 300–732.9 K, x(Ti) 0.5–0.5
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:moti)

Names (2): _corpus: _corpus:phase:mo-ti:moti  
_tdb: _tdb:MoTi-20Jia.tdb:MOTI  


### TDB models of MOTI (1): PHASE and CONSTITUENT statements as written

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): MOTI, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
71: PHASE MOTI % 2 1 1 !
72: CONST MOTI : MO : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_

## MOTI2 (Mo–Ti)

- Id: `phase:mo-ti:moti2`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (sgte_mmc2): (MoTi2) · C2/m (12) — Hallstedt 2025 mmc2 row for MOTI2: MoTi2
- Candidate (tdb_comment):  — MoTi-20Jia.tdb: 'Prototype unknown (mC\*, C2/m)'
- Stoichiometry: Mo 0.3333, Ti 0.6667
- Stability: stable in 1 of 1 calculated diagram(s): 300–865.54 K, x(Ti) 0.66667–0.66667
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:mo-ti:moti2)

Names (2): _corpus: _corpus:phase:mo-ti:moti2  
_tdb: _tdb:MoTi-20Jia.tdb:MOTI2  


### TDB models of MOTI2 (1): PHASE and CONSTITUENT statements as written

[MoTi-20Jia.tdb](https://orchid-project.org/data/databases/sgte-binary/MoTi-20Jia.tdb): MOTI2, type code %, sha256 `d8cb5a83578640f5…`

~~~~text
76: PHASE MOTI2 % 2 1 2 !
77: CONST MOTI2 : MO : TI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.mtla.2020.100701](https://doi.org/10.1016/j.mtla.2020.100701) Chao Jiang, Robert D. Mariani, Cynthia A. Adkins, Ab initio investigation and thermodynamic modeling of the Mo–Ti–Zr system, Materialia 10, 100701 (2020).  
_assessment that models this phase_

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970
- 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 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work).

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_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@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 the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).