Ti–W system

9 accepted literature values from 2 paper(s) (experimental 4, model 5); 4 calculated phase diagram(s). 5 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (4) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	4
model	5

Accepted values by property group
Property group	Values
invariant reaction	9

Calculated phase diagrams

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

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
TiW-93Jin.tdb	Z. Jin, C. Qiu, Mater. Sci. Technol., 9, 378-83(1993). doi:10.1179/mst.1993.9.5.378	`95099e4555c37256bf55761f3b77cd43b393e1389a58ca6eb28f7050c98fd7b8`	viewer · TDB · JSON
TiW-93Jon.tdb	S. Jonsson, TRITA-MAC 518, KTH Stockholm, 1993.	`b6e1ce9b615db11c30a6827bfbf89b5bd84ec05270b73d668b7f55c02e9dba06`	viewer · TDB · JSON
TiW-96Jon-LB.tdb	S. Jonsson, Z. Metallkd., 87, 784-87(1996). doi:10.1515/ijmr-1996-871008	`be3e187f7db1011473e5e102681c012bbe29ed45c61bc1bec681032cbdd7b838`	viewer · TDB · JSON
TiW-98Sau.tdb	N. Saunders, COST 507, Final report round 2, 1998.	`36471f2901b23e3cefb92e30cefeb1f4fcae95bae44b56af32f3f3508c8a988b`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
TiW-93Jin.tdb	1012.92	HCP_A3 (x(W) 0.00201) + BCC_A2#2 (x(W) 0.08754) + BCC_A2 (x(W) 0.64029)
TiW-93Jon.tdb	993.77	HCP_A3 (x(W) 0.0023) + BCC_A2#2 (x(W) 0.10077) + BCC_A2 (x(W) 0.57042)
TiW-96Jon-LB.tdb	1017.76	HCP_A3 (x(W) 0.00208) + BCC_A2#2 (x(W) 0.09656) + BCC_A2 (x(W) 0.64757)
TiW-98Sau.tdb	1019.53	HCP_A3 (x(W) 0.00189) + BCC_A2#2 (x(W) 0.09449) + BCC_A2 (x(W) 0.64547)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull TiW-93Jin · CALPHAD hull TiW-93Jon · CALPHAD hull TiW-96Jon-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ti–W system (9)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1033.15	monotectoid: bcc -> hcp -> bcc		experimental	[1] Jin 1993 cites s 1971	Table 2, p. 6, row 4 report
1030.15	monotectoid: bcc -> hcp -> bcc	bcc: W 0.76; hcp: W 0.009	model	[1] Jin 1993 cites KAUFMAN 1975	Table 2, p. 6, row 6 report
1019.5	monotectoid: hcp-A3 bcc-A2' -> bcc-A2"	hcp-A3: W 0.002; bcc-A2': W 0.645; bcc-A2": W 0.095	model	[2] (ed.) 1998	Table I, p. 318, row 1 report
1013.15	monotectoid: bcc -> hcp -> bcc	bcc: W 0.6403; hcp: W 0.002	model	[1] Jin 1993	Table 2, p. 6, row 12 report
1010.15	monotectoid: bcc -> hcp -> bcc	bcc: W 0.72; hcp: W 0.002	model	[1] Jin 1993 cites MURRAY 1981	Table 2, p. 6, row 8 report
1008.15	monotectoid: bcc -> hcp -> bcc	bcc: W 0.723; hcp: W 7.000e-4	model	[1] Jin 1993 cites s 1985	Table 2, p. 6, row 10 report
1008.15	monotectoid: bcc -> hcp -> bcc	bcc: W 0.087	experimental	[1] Jin 1993 cites IMGRAM 1961	Table 2, p. 6, row 3 report
998.15	monotectoid: bcc -> hcp -> bcc	bcc: W 0.09	experimental	[1] Jin 1993 cites Yu 1958	Table 2, p. 6, row 2 report
988.15	monotectoid: bcc -> hcp -> bcc	bcc: W 0.09; hcp: W 0.002	experimental	[1] Jin 1993 cites MAYKUTH 1953	Table 2, p. 6, row 1 report

Sources

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

Zhan-peng Jin, Caian Qiu, Thermodynamic evaluation of Ti–W system, Materials Science and Technology 9, 378-383 (1993). doi:10.1179/mst.1993.9.5.378
I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8.

Please cite

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

Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

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

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

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

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