Ti–V phases

5 phases (tier A 4, liquid 1); 3 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 · full JSON · Ti–V system page · Markdown · field reference

Phases of the Ti–V system (5)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:ti-v:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–3999.25 K, x(V) 0–1	1	7
OMEGA_C32 phase:ti-v:c32-omega	AlB2 · C32 · hP3 · P6/mmm (191)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	3
FCC_A1 phase:ti-v:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 6 calculated diagram(s)	0	7
HCP_A3 phase:ti-v:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–1242.34 K, x(V) 0–0.03316	0	7
LIQUID phase:ti-v:liquid	liquid	liquid	stable in 6 of 6 calculated diagram(s): 1867.33–4000 K, x(V) 0–1	3	7

BCC_A2 (Ti–V)

Id: phase:ti-v: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 6 of 6 calculated diagram(s): 300–3999.25 K, x(V) 0–1
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:ti-v:bcc-a2
paper: paper:sha256-85fd53a1a176b694:bcc-A2
tdb: tdb:TiV-02Gho-LB.tdb:BCC_A2, tdb:TiV-16Yan.tdb:BCC_A2, tdb:TiV-18Hu.tdb:BCC_A2, tdb:TiV-20Hu-3g.tdb:BCC_A2, tdb:TiV-90Sau.tdb:BCC_A2, tdb:TiV-98Sau.tdb:BCC_A2, tdb:TiV-99Lee.tdb:BCC_A2

TDB models of BCC_A2 (7): PHASE and CONSTITUENT statements as written

TiV-02Gho-LB.tdb: BCC_A2, type code %B, sha256 e28bba4cf464a99c…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : TI% V% : VA : !

TiV-16Yan.tdb: BCC_A2, type code %B, sha256 7d4bb1407b26ae19…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : TI% V% : VA : !

TiV-18Hu.tdb: BCC_A2, type code %B, sha256 141eaff2ffa0c132…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : TI% V% : VA : !

TiV-20Hu-3g.tdb: BCC_A2, type code %B, sha256 293508406ba96664…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : TI% V% : VA : !

TiV-90Sau.tdb: BCC_A2, type code %B, sha256 e10fac912e69679f…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : TI% V% : VA : !

TiV-98Sau.tdb: BCC_A2, type code %B, sha256 610f6137add069a6…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : TI% V% : VA : !

TiV-99Lee.tdb: BCC_A2, type code %B, sha256 45e3a36f6326de86…

31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : TI% V% : VA : !

Example references (6 of 6; assessments first):

doi:10.1016/0364-5916(90)90040-7 N. Saunders, Report to NPL contract No. 022805/10B, 1990. Cited from K.C. Hari Kumar, P. Wollants, L. Delaey, Calphad, 18, 71-79(1994).
assessment that models this phase
doi: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.intermet.2020.106791 Biao Hu, Soumya Sridar, Liangyan Hao, Wei Xiong, A new thermodynamic modeling of the Ti–V system including the metastable ω phase, Intermetallics 122, 106791 (2020).
assessment that models this phase
doi: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/S0925-8388(99)00144-9 J.Y. Lee, J.H. Kim, S.I. Park, H.M. Lee, J. Alloys Compd., 291, 229-38(1999).
assessment that models this phase
doi:10.1361/105497102770331569 G. Ghosh, Thermodynamic and kinetic modeling of the Cr-Ti-V system, JPE 23, 310-328 (2002).
assessment that models this phase

OMEGA_C32 (Ti–V)

Id: phase:ti-v: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

Names (4): corpus: corpus:phase:ti-v:c32-omega
tdb: tdb:TiV-16Yan.tdb:OMEGA_C32, tdb:TiV-18Hu.tdb:OMEGA_C32, tdb:TiV-20Hu-3g.tdb:OMEGA_C32

TDB models of OMEGA_C32 (3): PHASE and CONSTITUENT statements as written

TiV-16Yan.tdb: OMEGA_C32, type code %, sha256 7d4bb1407b26ae19…

41: PHASE OMEGA_C32 % 1 1 !
42: CONST OMEGA_C32 : TI V : !

TiV-18Hu.tdb: OMEGA_C32, type code %, sha256 141eaff2ffa0c132…

41: PHASE OMEGA_C32 % 1 1 !
42: CONST OMEGA_C32 : TI V : !

TiV-20Hu-3g.tdb: OMEGA_C32, type code %, sha256 293508406ba96664…

41: PHASE OMEGA_C32 % 1 1 !
42: CONST OMEGA_C32 : TI V : !

Example references (3 of 3; assessments first):

doi: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.intermet.2020.106791 Biao Hu, Soumya Sridar, Liangyan Hao, Wei Xiong, A new thermodynamic modeling of the Ti–V system including the metastable ω phase, Intermetallics 122, 106791 (2020).
assessment that models this phase
doi: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 (Ti–V)

Id: phase:ti-v: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 6 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:ti-v:fcc-a1
tdb: tdb:TiV-02Gho-LB.tdb:FCC_A1, tdb:TiV-16Yan.tdb:FCC_A1, tdb:TiV-18Hu.tdb:FCC_A1, tdb:TiV-20Hu-3g.tdb:FCC_A1, tdb:TiV-90Sau.tdb:FCC_A1, tdb:TiV-98Sau.tdb:FCC_A1, tdb:TiV-99Lee.tdb:FCC_A1

TDB models of FCC_A1 (7): PHASE and CONSTITUENT statements as written

TiV-02Gho-LB.tdb: FCC_A1, type code %A, sha256 e28bba4cf464a99c…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : TI V : VA : !

TiV-16Yan.tdb: FCC_A1, type code %A, sha256 7d4bb1407b26ae19…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : TI V : VA : !

TiV-18Hu.tdb: FCC_A1, type code %A, sha256 141eaff2ffa0c132…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : TI V : VA : !

TiV-20Hu-3g.tdb: FCC_A1, type code %A, sha256 293508406ba96664…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : TI V : VA : !

TiV-90Sau.tdb: FCC_A1, type code %A, sha256 e10fac912e69679f…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : TI V : VA : !

TiV-98Sau.tdb: FCC_A1, type code %A, sha256 610f6137add069a6…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : TI V : VA : !

TiV-99Lee.tdb: FCC_A1, type code %A, sha256 45e3a36f6326de86…

26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : TI V : VA : !

Example references (6 of 6; assessments first):

doi:10.1016/0364-5916(90)90040-7 N. Saunders, Report to NPL contract No. 022805/10B, 1990. Cited from K.C. Hari Kumar, P. Wollants, L. Delaey, Calphad, 18, 71-79(1994).
assessment that models this phase
doi: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.intermet.2020.106791 Biao Hu, Soumya Sridar, Liangyan Hao, Wei Xiong, A new thermodynamic modeling of the Ti–V system including the metastable ω phase, Intermetallics 122, 106791 (2020).
assessment that models this phase
doi: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/S0925-8388(99)00144-9 J.Y. Lee, J.H. Kim, S.I. Park, H.M. Lee, J. Alloys Compd., 291, 229-38(1999).
assessment that models this phase
doi:10.1361/105497102770331569 G. Ghosh, Thermodynamic and kinetic modeling of the Cr-Ti-V system, JPE 23, 310-328 (2002).
assessment that models this phase

HCP_A3 (Ti–V)

Id: phase:ti-v: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 6 of 6 calculated diagram(s): 300–1242.34 K, x(V) 0–0.03316
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:ti-v:hcp-a3
tdb: tdb:TiV-02Gho-LB.tdb:HCP_A3, tdb:TiV-16Yan.tdb:HCP_A3, tdb:TiV-18Hu.tdb:HCP_A3, tdb:TiV-20Hu-3g.tdb:HCP_A3, tdb:TiV-90Sau.tdb:HCP_A3, tdb:TiV-98Sau.tdb:HCP_A3, tdb:TiV-99Lee.tdb:HCP_A3

TDB models of HCP_A3 (7): PHASE and CONSTITUENT statements as written

TiV-02Gho-LB.tdb: HCP_A3, type code %A, sha256 e28bba4cf464a99c…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : TI% V : VA : !

TiV-16Yan.tdb: HCP_A3, type code %A, sha256 7d4bb1407b26ae19…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : TI% V : VA : !

TiV-18Hu.tdb: HCP_A3, type code %A, sha256 141eaff2ffa0c132…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : TI% V : VA : !

TiV-20Hu-3g.tdb: HCP_A3, type code %A, sha256 293508406ba96664…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : TI% V : VA : !

TiV-90Sau.tdb: HCP_A3, type code %A, sha256 e10fac912e69679f…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : TI% V : VA : !

TiV-98Sau.tdb: HCP_A3, type code %A, sha256 610f6137add069a6…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : TI% V : VA : !

TiV-99Lee.tdb: HCP_A3, type code %A, sha256 45e3a36f6326de86…

36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : TI% V : VA : !

Example references (6 of 6; assessments first):

doi:10.1016/0364-5916(90)90040-7 N. Saunders, Report to NPL contract No. 022805/10B, 1990. Cited from K.C. Hari Kumar, P. Wollants, L. Delaey, Calphad, 18, 71-79(1994).
assessment that models this phase
doi: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.intermet.2020.106791 Biao Hu, Soumya Sridar, Liangyan Hao, Wei Xiong, A new thermodynamic modeling of the Ti–V system including the metastable ω phase, Intermetallics 122, 106791 (2020).
assessment that models this phase
doi: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/S0925-8388(99)00144-9 J.Y. Lee, J.H. Kim, S.I. Park, H.M. Lee, J. Alloys Compd., 291, 229-38(1999).
assessment that models this phase
doi:10.1361/105497102770331569 G. Ghosh, Thermodynamic and kinetic modeling of the Cr-Ti-V system, JPE 23, 310-328 (2002).
assessment that models this phase

LIQUID (Ti–V)

Id: phase:ti-v:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 6 of 6 calculated diagram(s): 1867.33–4000 K, x(V) 0–1
Literature: 3 values (1 accepted) from 2 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:ti-v:liquid
paper: paper:10.1016/j.intermet.2020.106791:liquid, paper:sha256-85fd53a1a176b694:Liquid
tdb: tdb:TiV-02Gho-LB.tdb:LIQUID, tdb:TiV-16Yan.tdb:LIQUID, tdb:TiV-18Hu.tdb:LIQUID, tdb:TiV-20Hu-3g.tdb:LIQUID, tdb:TiV-90Sau.tdb:LIQUID, tdb:TiV-98Sau.tdb:LIQUID, tdb:TiV-99Lee.tdb:LIQUID

TDB models of LIQUID (7): PHASE and CONSTITUENT statements as written

TiV-02Gho-LB.tdb: LIQUID, type code %, sha256 e28bba4cf464a99c…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : TI V : !

TiV-16Yan.tdb: LIQUID, type code %, sha256 7d4bb1407b26ae19…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : TI V : !

TiV-18Hu.tdb: LIQUID, type code %, sha256 141eaff2ffa0c132…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : TI V : !

TiV-20Hu-3g.tdb: LIQUID, type code %, sha256 293508406ba96664…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : TI V : !

TiV-90Sau.tdb: LIQUID, type code %, sha256 e10fac912e69679f…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : TI V : !

TiV-98Sau.tdb: LIQUID, type code %, sha256 610f6137add069a6…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : TI V : !

TiV-99Lee.tdb: LIQUID, type code %, sha256 45e3a36f6326de86…

21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : TI V : !

Example references (6 of 6; assessments first):

doi:10.1016/j.intermet.2020.106791 Biao Hu, Soumya Sridar, Liangyan Hao, Wei Xiong, A new thermodynamic modeling of the Ti–V system including the metastable ω phase, Intermetallics 122, 106791 (2020).
assessment that models this phase; reports values for this phase
doi:10.1016/0364-5916(90)90040-7 N. Saunders, Report to NPL contract No. 022805/10B, 1990. Cited from K.C. Hari Kumar, P. Wollants, L. Delaey, Calphad, 18, 71-79(1994).
assessment that models this phase
doi: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 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/S0925-8388(99)00144-9 J.Y. Lee, J.H. Kim, S.I. Park, H.M. Lee, J. Alloys Compd., 291, 229-38(1999).
assessment that models this phase
doi:10.1361/105497102770331569 G. Ghosh, Thermodynamic and kinetic modeling of the Cr-Ti-V system, JPE 23, 310-328 (2002).
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). doi: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). doi: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.

@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}
}