Co–Ti phases

9 phases (tier A 7, tier C 1, liquid 1); 9 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 · Co–Ti system page · Markdown · field reference

Phases of the Co–Ti system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:co-ti:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 1050–1920 K, x(Ti) 0.89–0.96	31	12
B2_BCC phase:co-ti:bcc-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–2499.95 K, x(Ti) 0.41482–1	50	6
C15_LAVES phase:co-ti:c15-laves	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–1524.39 K, x(Ti) 0.31983–0.34062	33	6
C36_LAVES phase:co-ti:c36-laves	MgNi2 · C36 · hP24 · P6_3/mmc (194)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–1550 K, x(Ti) 0.28715–0.3333	36	6
COTI2 phase:co-ti:coti2	NiTi2 · cF96 · Fd-3m (227)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 6 of 6 calculated diagram(s): 300–1340 K, x(Ti) 0.66667–0.66667	49	6
FCC_A1 phase:co-ti:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 593.41–1885.95 K, x(Ti) 0–0.15423	37	12
L12_FCC phase:co-ti:fcc-l12	AuCu3 · L1_2 · cP4 · Pm-3m (221)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–1885.95 K, x(Ti) 0–0.25	55	6
HCP_A3 phase:co-ti:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–1163.96 K, x(Ti) 0–1	18	6
LIQUID phase:co-ti:liquid	liquid	liquid	stable in 6 of 6 calculated diagram(s): 1282.88–2500 K, x(Ti) 0–1	139	6

BCC_A2 (Co–Ti)

Id: phase:co-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 6 of 6 calculated diagram(s): 1050–1920 K, x(Ti) 0.89–0.96
Literature: 31 values (31 accepted) from 4 papers
Interactive: phase registry entry

Names (18): corpus: corpus:phase:co-ti:bcc-a2
paper: paper:10.1007/s11661-001-0193-8:A2, paper:10.1007/s42243-021-00736-6:β-Ti, paper:10.1016/j.jct.2019.105995:A2, paper:10.1016/j.jct.2019.105995:A2(βTi), paper:10.1016/s0966-9795(99)00098-9:A2
tdb: tdb:CoTi-00Cac.tdb:A2_BCC, tdb:CoTi-00Cac.tdb:BCC_A2, tdb:CoTi-01Dav-LB.tdb:A2_BCC, tdb:CoTi-01Dav-LB.tdb:BCC_A2, tdb:CoTi-18Zho.tdb:A2_BCC, tdb:CoTi-18Zho.tdb:BCC_A2, tdb:CoTi-20Wu.tdb:A2_BCC, tdb:CoTi-20Wu.tdb:BCC_A2, tdb:CoTi-22Yan.tdb:A2_BCC, tdb:CoTi-22Yan.tdb:BCC_A2, tdb:CoTi-24Tur.tdb:A2_BCC, tdb:CoTi-24Tur.tdb:BCC_A2

TDB models of BCC_A2 (12): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: A2_BCC, type code %B, sha256 6fb1ebbac943b8ac…

45: PHASE A2_BCC %B 2 1 3 !
46: CONST A2_BCC : CO TI VA : VA : !

CoTi-00Cac.tdb: BCC_A2, type code %B, sha256 6fb1ebbac943b8ac…

40: PHASE BCC_A2 %B 2 1 3 !
41: CONST BCC_A2 : CO TI% : VA : !

CoTi-01Dav-LB.tdb: A2_BCC, type code %B, sha256 b8589e70960bb053…

46: PHASE A2_BCC %B 2 1 3 !
47: CONST A2_BCC : CO TI VA : VA : !

CoTi-01Dav-LB.tdb: BCC_A2, type code %B, sha256 b8589e70960bb053…

41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : CO TI% : VA : !

CoTi-18Zho.tdb: A2_BCC, type code %B, sha256 647d0f8bf6e642c1…

46: PHASE A2_BCC %B 2 1 3 !
47: CONST A2_BCC : CO TI VA : VA : !

CoTi-18Zho.tdb: BCC_A2, type code %B, sha256 647d0f8bf6e642c1…

41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : CO TI% : VA : !

CoTi-20Wu.tdb: A2_BCC, type code %B, sha256 c8f2189ee1f4e5d7…

47: PHASE A2_BCC %B 2 1 3 !
48: CONST A2_BCC : CO TI VA : VA : !

CoTi-20Wu.tdb: BCC_A2, type code %B, sha256 c8f2189ee1f4e5d7…

42: PHASE BCC_A2 %B 2 1 3 !
43: CONST BCC_A2 : CO TI% : VA : !

CoTi-22Yan.tdb: A2_BCC, type code %B, sha256 18ac015ba2b74def…

48: PHASE A2_BCC %B 2 1 3 !
49: CONST A2_BCC : CO TI VA : VA : !

CoTi-22Yan.tdb: BCC_A2, type code %B, sha256 18ac015ba2b74def…

43: PHASE BCC_A2 %B 2 1 3 !
44: CONST BCC_A2 : CO TI% : VA : !

CoTi-24Tur.tdb: A2_BCC, type code %B, sha256 8e8ceb6778fdc32a…

62: PHASE A2_BCC %B 2 1 3 !
63: CONST A2_BCC : CO TI VA : VA : !

CoTi-24Tur.tdb: BCC_A2, type code %B, sha256 8e8ceb6778fdc32a…

57: PHASE BCC_A2 %B 2 1 3 !
58: CONST BCC_A2 : CO TI% : VA : !

Example references (7 of 7; assessments first):

doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase

B2_BCC (Co–Ti)

Id: phase:co-ti:bcc-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: CoTi-00Cac.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CoTi-01Dav-LB.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CoTi-18Zho.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CoTi-20Wu.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CoTi-22Yan.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CoTi-24Tur.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: partitioned order/disorder model in CoTi-00Cac.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-01Dav-LB.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-18Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-20Wu.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-22Yan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-24Tur.tdb also describes the disordered state
Stability: stable in 6 of 6 calculated diagram(s): 300–2499.95 K, x(Ti) 0.41482–1
Literature: 50 values (50 accepted) from 5 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:co-ti:bcc-b2, corpus:phase:co-ti:b2-bcc
paper: paper:10.1007/s11661-001-0193-8:B2, paper:10.1007/s11669-024-01094-y:CoTi, paper:10.1007/s42243-021-00736-6:CoTi, paper:10.1016/j.jct.2019.105995:B2, paper:10.1016/s0966-9795(99)00098-9:B2
tdb: tdb:CoTi-00Cac.tdb:B2_BCC, tdb:CoTi-01Dav-LB.tdb:B2_BCC, tdb:CoTi-18Zho.tdb:B2_BCC, tdb:CoTi-20Wu.tdb:B2_BCC, tdb:CoTi-22Yan.tdb:B2_BCC, tdb:CoTi-24Tur.tdb:B2_BCC

TDB models of B2_BCC (6): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: B2_BCC, type code %BO, sha256 6fb1ebbac943b8ac…

50: PHASE B2_BCC %BO 3 0.5 0.5 3 !
51: CONST B2_BCC : CO% TI VA : CO TI% VA : VA : !

CoTi-01Dav-LB.tdb: B2_BCC, type code %BO, sha256 b8589e70960bb053…

51: PHASE B2_BCC %BO 3 0.5 0.5 3 !
52: CONST B2_BCC : CO% TI VA : CO TI% VA : VA : !

CoTi-18Zho.tdb: B2_BCC, type code %BO, sha256 647d0f8bf6e642c1…

51: PHASE B2_BCC %BO 3 0.5 0.5 3 !
52: CONST B2_BCC : CO% TI VA : CO TI% VA : VA : !

CoTi-20Wu.tdb: B2_BCC, type code %BO, sha256 c8f2189ee1f4e5d7…

52: PHASE B2_BCC %BO 3 0.5 0.5 3 !
53: CONST B2_BCC : CO% TI VA : CO TI% VA : VA : !

CoTi-22Yan.tdb: B2_BCC, type code %BO, sha256 18ac015ba2b74def…

53: PHASE B2_BCC %BO 3 0.5 0.5 3 !
54: CONST B2_BCC : CO% TI VA : CO TI% VA : VA : !

CoTi-24Tur.tdb: B2_BCC, type code %BO, sha256 8e8ceb6778fdc32a…

67: PHASE B2_BCC %BO 3 0.5 0.5 3 !
68: CONST B2_BCC : CO% TI VA : CO TI% VA : VA : !

Example references (8 of 8; assessments first):

doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase
doi:10.1016/j.calphad.2019.101681 F. Stein, M. Merali, and P. Watermeyer, The Co-Ti System Revisited: About the Cubic-to-Hexagonal Laves Phase Transformation and Other Controversial Features of the Phase Diagram, Calphad, 2019, 67(2), 101681.
cited as the source of values for this phase

C15_LAVES (Co–Ti)

Id: phase:co-ti:c15-laves; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTi-00Cac.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-01Dav-LB.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-18Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-20Wu.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-22Yan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-24Tur.tdb also describes the disordered state
Stability: stable in 6 of 6 calculated diagram(s): 300–1524.39 K, x(Ti) 0.31983–0.34062
Literature: 33 values (33 accepted) from 4 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:co-ti:c15-laves
paper: paper:10.1007/s11661-001-0193-8:C15, paper:10.1007/s11669-024-01094-y:C15, paper:10.1016/j.jct.2019.105995:C15, paper:10.1016/s0966-9795(99)00098-9:C15
tdb: tdb:CoTi-00Cac.tdb:C15_LAVES, tdb:CoTi-01Dav-LB.tdb:C15_LAVES, tdb:CoTi-18Zho.tdb:C15_LAVES, tdb:CoTi-20Wu.tdb:C15_LAVES, tdb:CoTi-22Yan.tdb:C15_LAVES, tdb:CoTi-24Tur.tdb:C15_LAVES

TDB models of C15_LAVES (6): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: C15_LAVES, type code %, sha256 6fb1ebbac943b8ac…

65: PHASE C15_LAVES % 2 2 1 !
66: CONST C15_LAVES : CO% TI : CO TI% : !

CoTi-01Dav-LB.tdb: C15_LAVES, type code %, sha256 b8589e70960bb053…

66: PHASE C15_LAVES % 2 2 1 !
67: CONST C15_LAVES : CO% TI : CO TI% : !

CoTi-18Zho.tdb: C15_LAVES, type code %, sha256 647d0f8bf6e642c1…

66: PHASE C15_LAVES % 2 2 1 !
67: CONST C15_LAVES : CO% TI : CO TI% : !

CoTi-20Wu.tdb: C15_LAVES, type code %, sha256 c8f2189ee1f4e5d7…

67: PHASE C15_LAVES % 2 2 1 !
68: CONST C15_LAVES : CO% TI : CO TI% : !

CoTi-22Yan.tdb: C15_LAVES, type code %, sha256 18ac015ba2b74def…

68: PHASE C15_LAVES % 2 2 1 !
69: CONST C15_LAVES : CO% TI : CO TI% : !

CoTi-24Tur.tdb: C15_LAVES, type code %, sha256 8e8ceb6778fdc32a…

82: PHASE C15_LAVES % 2 2 1 !
83: CONST C15_LAVES : CO% TI : CO TI% : !

Example references (8 of 8; assessments first):

doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase
doi:10.1016/j.calphad.2019.101681 F. Stein, M. Merali, and P. Watermeyer, The Co-Ti System Revisited: About the Cubic-to-Hexagonal Laves Phase Transformation and Other Controversial Features of the Phase Diagram, Calphad, 2019, 67(2), 101681.
cited as the source of values for this phase

C36_LAVES (Co–Ti)

Id: phase:co-ti:c36-laves; status assigned
Structure: MgNi2 · C36 · hP24 · P6_3/mmc (194); type st:c36-mgni2-hp24; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CoTi-00Cac.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-01Dav-LB.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-18Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-20Wu.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-22Yan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-24Tur.tdb also describes the disordered state
Stability: stable in 6 of 6 calculated diagram(s): 300–1550 K, x(Ti) 0.28715–0.3333
Literature: 36 values (36 accepted) from 4 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:co-ti:c36-laves
paper: paper:10.1007/s11661-001-0193-8:C36, paper:10.1007/s11669-024-01094-y:C36, paper:10.1016/j.jct.2019.105995:C36, paper:10.1016/s0966-9795(99)00098-9:C36
tdb: tdb:CoTi-00Cac.tdb:C36_LAVES, tdb:CoTi-01Dav-LB.tdb:C36_LAVES, tdb:CoTi-18Zho.tdb:C36_LAVES, tdb:CoTi-20Wu.tdb:C36_LAVES, tdb:CoTi-22Yan.tdb:C36_LAVES, tdb:CoTi-24Tur.tdb:C36_LAVES

TDB models of C36_LAVES (6): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: C36_LAVES, type code %, sha256 6fb1ebbac943b8ac…

60: PHASE C36_LAVES % 2 2 1 !
61: CONST C36_LAVES : CO% TI : CO TI% : !

CoTi-01Dav-LB.tdb: C36_LAVES, type code %, sha256 b8589e70960bb053…

61: PHASE C36_LAVES % 2 2 1 !
62: CONST C36_LAVES : CO% TI : CO TI% : !

CoTi-18Zho.tdb: C36_LAVES, type code %, sha256 647d0f8bf6e642c1…

61: PHASE C36_LAVES % 2 2 1 !
62: CONST C36_LAVES : CO% TI : CO TI% : !

CoTi-20Wu.tdb: C36_LAVES, type code %, sha256 c8f2189ee1f4e5d7…

62: PHASE C36_LAVES % 2 2 1 !
63: CONST C36_LAVES : CO% TI : CO TI% : !

CoTi-22Yan.tdb: C36_LAVES, type code %, sha256 18ac015ba2b74def…

63: PHASE C36_LAVES % 2 2 1 !
64: CONST C36_LAVES : CO% TI : CO TI% : !

CoTi-24Tur.tdb: C36_LAVES, type code %, sha256 8e8ceb6778fdc32a…

77: PHASE C36_LAVES % 2 2 1 !
78: CONST C36_LAVES : CO% TI : CO TI% : !

Example references (8 of 8; assessments first):

doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; cited as the source of values for this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase
doi:10.1016/j.calphad.2019.101681 F. Stein, M. Merali, and P. Watermeyer, The Co-Ti System Revisited: About the Cubic-to-Hexagonal Laves Phase Transformation and Other Controversial Features of the Phase Diagram, Calphad, 2019, 67(2), 101681.
cited as the source of values for this phase

COTI2 (Co–Ti)

Id: phase:co-ti:coti2; status assigned
Structure: NiTi2 · cF96 · Fd-3m (227); type st:niti2-cf96; 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
Caveat: not certain from the name or DFT alone (mp_oqmd_space_groups_differ, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Co 0.3333, Ti 0.6667
Stability: stable in 6 of 6 calculated diagram(s): 300–1340 K, x(Ti) 0.66667–0.66667
Literature: 49 values (49 accepted) from 5 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:co-ti:coti2
paper: paper:10.1007/s11661-001-0193-8:CoTi2, paper:10.1007/s11669-024-01094-y:CoTi2, paper:10.1007/s42243-021-00736-6:CoTi2, paper:10.1016/j.jct.2019.105995:CoTi2, paper:10.1016/j.jct.2019.105995:E93, paper:10.1016/s0966-9795(99)00098-9:CoTi2
tdb: tdb:CoTi-00Cac.tdb:COTI2, tdb:CoTi-01Dav-LB.tdb:COTI2, tdb:CoTi-18Zho.tdb:COTI2, tdb:CoTi-20Wu.tdb:COTI2, tdb:CoTi-22Yan.tdb:COTI2, tdb:CoTi-24Tur.tdb:COTI2

TDB models of COTI2 (6): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: COTI2, type code %, sha256 6fb1ebbac943b8ac…

70: PHASE COTI2 % 2 1 2 !
71: CONST COTI2 : CO : TI : !

CoTi-01Dav-LB.tdb: COTI2, type code %, sha256 b8589e70960bb053…

71: PHASE COTI2 % 2 1 2 !
72: CONST COTI2 : CO : TI : !

CoTi-18Zho.tdb: COTI2, type code %, sha256 647d0f8bf6e642c1…

71: PHASE COTI2 % 2 1 2 !
72: CONST COTI2 : CO : TI : !

CoTi-20Wu.tdb: COTI2, type code %, sha256 c8f2189ee1f4e5d7…

72: PHASE COTI2 % 2 1 2 !
73: CONST COTI2 : CO : TI : !

CoTi-22Yan.tdb: COTI2, type code %, sha256 18ac015ba2b74def…

73: PHASE COTI2 % 2 1 2 !
74: CONST COTI2 : CO : TI : !

CoTi-24Tur.tdb: COTI2, type code %, sha256 8e8ceb6778fdc32a…

87: PHASE COTI2 % 2 1 2 !
88: CONST COTI2 : CO : TI : !

Example references (7 of 7; assessments first):

doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; reports values for this phase
doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase

FCC_A1 (Co–Ti)

Id: phase:co-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: stable in 6 of 6 calculated diagram(s): 593.41–1885.95 K, x(Ti) 0–0.15423
Literature: 37 values (37 accepted) from 5 papers
Interactive: phase registry entry

Names (20): corpus: corpus:phase:co-ti:fcc-a1
paper: paper:10.1007/s11661-001-0193-8:A1, paper:10.1007/s11669-024-01094-y:(αCo), paper:10.1007/s11669-024-01094-y:(αCo)para, paper:10.1007/s42243-021-00736-6:α-Co, paper:10.1016/j.jct.2019.105995:A1, paper:10.1016/j.jct.2019.105995:A1(αCo), paper:10.1016/s0966-9795(99)00098-9:A1
tdb: tdb:CoTi-00Cac.tdb:A1_FCC, tdb:CoTi-00Cac.tdb:FCC_A1, tdb:CoTi-01Dav-LB.tdb:A1_FCC, tdb:CoTi-01Dav-LB.tdb:FCC_A1, tdb:CoTi-18Zho.tdb:A1_FCC, tdb:CoTi-18Zho.tdb:FCC_A1, tdb:CoTi-20Wu.tdb:A1_FCC, tdb:CoTi-20Wu.tdb:FCC_A1, tdb:CoTi-22Yan.tdb:A1_FCC, tdb:CoTi-22Yan.tdb:FCC_A1, tdb:CoTi-24Tur.tdb:A1_FCC, tdb:CoTi-24Tur.tdb:FCC_A1

TDB models of FCC_A1 (12): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: A1_FCC, type code %A, sha256 6fb1ebbac943b8ac…

30: PHASE A1_FCC %A 2 1 1 !
31: CONST A1_FCC : CO% TI : VA : !

CoTi-00Cac.tdb: FCC_A1, type code %A, sha256 6fb1ebbac943b8ac…

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

CoTi-01Dav-LB.tdb: A1_FCC, type code %A, sha256 b8589e70960bb053…

31: PHASE A1_FCC %A 2 1 1 !
32: CONST A1_FCC : CO% TI : VA : !

CoTi-01Dav-LB.tdb: FCC_A1, type code %A, sha256 b8589e70960bb053…

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

CoTi-18Zho.tdb: A1_FCC, type code %A, sha256 647d0f8bf6e642c1…

31: PHASE A1_FCC %A 2 1 1 !
32: CONST A1_FCC : CO% TI : VA : !

CoTi-18Zho.tdb: FCC_A1, type code %A, sha256 647d0f8bf6e642c1…

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

CoTi-20Wu.tdb: A1_FCC, type code %A, sha256 c8f2189ee1f4e5d7…

32: PHASE A1_FCC %A 2 1 1 !
33: CONST A1_FCC : CO% TI : VA : !

CoTi-20Wu.tdb: FCC_A1, type code %A, sha256 c8f2189ee1f4e5d7…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : CO% TI : VA : !

CoTi-22Yan.tdb: A1_FCC, type code %A, sha256 18ac015ba2b74def…

33: PHASE A1_FCC %A 2 1 1 !
34: CONST A1_FCC : CO% TI : VA : !

CoTi-22Yan.tdb: FCC_A1, type code %A, sha256 18ac015ba2b74def…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : CO% TI : VA : !

CoTi-24Tur.tdb: A1_FCC, type code %A, sha256 8e8ceb6778fdc32a…

47: PHASE A1_FCC %A 2 1 1 !
48: CONST A1_FCC : CO% TI : VA : !

CoTi-24Tur.tdb: FCC_A1, type code %A, sha256 8e8ceb6778fdc32a…

42: PHASE FCC_A1 %A 2 1 1 !
43: CONST FCC_A1 : CO% TI : VA : !

Example references (8 of 8; assessments first):

doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase
doi:10.1016/j.calphad.2019.101681 F. Stein, M. Merali, and P. Watermeyer, The Co-Ti System Revisited: About the Cubic-to-Hexagonal Laves Phase Transformation and Other Controversial Features of the Phase Diagram, Calphad, 2019, 67(2), 101681.
cited as the source of values for this phase

L12_FCC (Co–Ti)

Id: phase:co-ti:fcc-l12; status assigned
Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type st:l1-2-aucu3-cp4; tier A: standard phase name; confidence high
Caveat: CoTi-00Cac.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: CoTi-01Dav-LB.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: CoTi-18Zho.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: CoTi-20Wu.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: CoTi-22Yan.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: CoTi-24Tur.tdb: ordered phase with disordered part A1_FCC (order/disorder model)
Caveat: partitioned order/disorder model in CoTi-00Cac.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-01Dav-LB.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-18Zho.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-20Wu.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-22Yan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CoTi-24Tur.tdb also describes the disordered state
Stability: stable in 6 of 6 calculated diagram(s): 300–1885.95 K, x(Ti) 0–0.25
Literature: 55 values (55 accepted) from 5 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:co-ti:fcc-l12, corpus:phase:co-ti:l12-fcc
paper: paper:10.1007/s11661-001-0193-8:L12, paper:10.1007/s11669-024-01094-y:Co3Ti, paper:10.1007/s42243-021-00736-6:Co3Ti, paper:10.1016/j.jct.2019.105995:L12, paper:10.1016/s0966-9795(99)00098-9:L12
tdb: tdb:CoTi-00Cac.tdb:L12_FCC, tdb:CoTi-01Dav-LB.tdb:L12_FCC, tdb:CoTi-18Zho.tdb:L12_FCC, tdb:CoTi-20Wu.tdb:L12_FCC, tdb:CoTi-22Yan.tdb:L12_FCC, tdb:CoTi-24Tur.tdb:L12_FCC

TDB models of L12_FCC (6): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: L12_FCC, type code %AY, sha256 6fb1ebbac943b8ac…

35: PHASE L12_FCC %AY 3 0.75 0.25 1 !
36: CONST L12_FCC : CO% TI : CO TI% : VA :  !

CoTi-01Dav-LB.tdb: L12_FCC, type code %AY, sha256 b8589e70960bb053…

36: PHASE L12_FCC %AY 3 0.75 0.25 1 !
37: CONST L12_FCC : CO% TI : CO TI% : VA :  !

CoTi-18Zho.tdb: L12_FCC, type code %AY, sha256 647d0f8bf6e642c1…

36: PHASE L12_FCC %AY 3 0.75 0.25 1 !
37: CONST L12_FCC : CO% TI : CO TI% : VA :  !

CoTi-20Wu.tdb: L12_FCC, type code %AY, sha256 c8f2189ee1f4e5d7…

37: PHASE L12_FCC %AY 3 0.75 0.25 1 !
38: CONST L12_FCC : CO% TI : CO TI% : VA :  !

CoTi-22Yan.tdb: L12_FCC, type code %AY, sha256 18ac015ba2b74def…

38: PHASE L12_FCC %AY 3 0.75 0.25 1 !
39: CONST L12_FCC : CO% TI : CO TI% : VA :  !

CoTi-24Tur.tdb: L12_FCC, type code %AY, sha256 8e8ceb6778fdc32a…

52: PHASE L12_FCC %AY 3 0.75 0.25 1 !
53: CONST L12_FCC : CO% TI : CO TI% : VA :  !

Example references (8 of 8; assessments first):

doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase
doi:10.1016/j.calphad.2019.101681 F. Stein, M. Merali, and P. Watermeyer, The Co-Ti System Revisited: About the Cubic-to-Hexagonal Laves Phase Transformation and Other Controversial Features of the Phase Diagram, Calphad, 2019, 67(2), 101681.
cited as the source of values for this phase

HCP_A3 (Co–Ti)

Id: phase:co-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 6 of 6 calculated diagram(s): 300–1163.96 K, x(Ti) 0–1
Literature: 18 values (18 accepted) from 5 papers
Interactive: phase registry entry

Names (14): corpus: corpus:phase:co-ti:hcp-a3
paper: paper:10.1007/s11661-001-0193-8:A3, paper:10.1007/s11669-024-01094-y:(εCo), paper:10.1007/s42243-021-00736-6:α-Ti, paper:10.1007/s42243-021-00736-6:ε-Co, paper:10.1016/j.jct.2019.105995:A3, paper:10.1016/j.jct.2019.105995:A3(αTi), paper:10.1016/s0966-9795(99)00098-9:A3
tdb: tdb:CoTi-00Cac.tdb:HCP_A3, tdb:CoTi-01Dav-LB.tdb:HCP_A3, tdb:CoTi-18Zho.tdb:HCP_A3, tdb:CoTi-20Wu.tdb:HCP_A3, tdb:CoTi-22Yan.tdb:HCP_A3, tdb:CoTi-24Tur.tdb:HCP_A3

TDB models of HCP_A3 (6): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: HCP_A3, type code %A, sha256 6fb1ebbac943b8ac…

55: PHASE HCP_A3 %A 2 1 0.5 !
56: CONST HCP_A3 : CO% TI% : VA : !

CoTi-01Dav-LB.tdb: HCP_A3, type code %A, sha256 b8589e70960bb053…

56: PHASE HCP_A3 %A 2 1 0.5 !
57: CONST HCP_A3 : CO% TI% : VA : !

CoTi-18Zho.tdb: HCP_A3, type code %A, sha256 647d0f8bf6e642c1…

56: PHASE HCP_A3 %A 2 1 0.5 !
57: CONST HCP_A3 : CO% TI% : VA : !

CoTi-20Wu.tdb: HCP_A3, type code %A, sha256 c8f2189ee1f4e5d7…

57: PHASE HCP_A3 %A 2 1 0.5 !
58: CONST HCP_A3 : CO% TI% : VA : !

CoTi-22Yan.tdb: HCP_A3, type code %A, sha256 18ac015ba2b74def…

58: PHASE HCP_A3 %A 2 1 0.5 !
59: CONST HCP_A3 : CO% TI% : VA : !

CoTi-24Tur.tdb: HCP_A3, type code %A, sha256 8e8ceb6778fdc32a…

72: PHASE HCP_A3 %A 2 1 0.5 !
73: CONST HCP_A3 : CO% TI% : VA : !

Example references (7 of 7; assessments first):

doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase

LIQUID (Co–Ti)

Id: phase:co-ti:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 6 of 6 calculated diagram(s): 1282.88–2500 K, x(Ti) 0–1
Literature: 139 values (139 accepted) from 5 papers
Interactive: phase registry entry

Names (15): corpus: corpus:phase:co-ti:liquid
paper: paper:10.1007/s11661-001-0193-8:L, paper:10.1007/s11661-001-0193-8:liquid, paper:10.1007/s11669-024-01094-y:L, paper:10.1007/s42243-021-00736-6:Liquid, paper:10.1007/s42243-021-00736-6:liquid, paper:10.1016/j.jct.2019.105995:L, paper:10.1016/j.jct.2019.105995:liquid, paper:10.1016/s0966-9795(99)00098-9:Liquid
tdb: tdb:CoTi-00Cac.tdb:LIQUID, tdb:CoTi-01Dav-LB.tdb:LIQUID, tdb:CoTi-18Zho.tdb:LIQUID, tdb:CoTi-20Wu.tdb:LIQUID, tdb:CoTi-22Yan.tdb:LIQUID, tdb:CoTi-24Tur.tdb:LIQUID

TDB models of LIQUID (6): PHASE and CONSTITUENT statements as written

CoTi-00Cac.tdb: LIQUID, type code %, sha256 6fb1ebbac943b8ac…

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

CoTi-01Dav-LB.tdb: LIQUID, type code %, sha256 b8589e70960bb053…

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

CoTi-18Zho.tdb: LIQUID, type code %, sha256 647d0f8bf6e642c1…

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

CoTi-20Wu.tdb: LIQUID, type code %, sha256 c8f2189ee1f4e5d7…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : CO TI : !

CoTi-22Yan.tdb: LIQUID, type code %, sha256 18ac015ba2b74def…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : CO TI : !

CoTi-24Tur.tdb: LIQUID, type code %, sha256 8e8ceb6778fdc32a…

37: PHASE LIQUID:L % 1 1 !
38: CONST LIQUID:L : CO COTI COTI2 CO2TI TI : !

Example references (8 of 8; assessments first):

doi:10.1007/s11661-001-0193-8 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1007/s11669-024-01094-y Mykhailo Turchanin, Pavlo Agraval, Anna Vodopyanova, Liya Dreval, Thermodynamic Assessment of the Co-Ti System, J. Phase Equilib. Diffus. 45, 434-446 (2024).
assessment that models this phase; reports values for this phase
doi:10.1007/s42243-021-00736-6 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.jct.2019.105995 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).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/S0966-9795(99)00098-9 G. Cacciamani, R. Ferro, I. Ansara, N. Dupin, Intermetallics, 8, 213-22(2000).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2018.08.011 C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 63, 61-76(2018).
assessment that models this phase
doi:10.1007/bf02873414 Joanne L. Murray, The Co−Ti (Cobalt−Titanium) system, Bulletin of Alloy Phase Diagrams 3 (1982).
cited as the source of values for this phase
doi:10.1016/j.calphad.2019.101681 F. Stein, M. Merali, and P. Watermeyer, The Co-Ti System Revisited: About the Cubic-to-Hexagonal Laves Phase Transformation and Other Controversial Features of the Phase Diagram, Calphad, 2019, 67(2), 101681.
cited as the source of values for 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}
}