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Titanium and TiAl-based Alloys Databases

TCTI7 is our thermodynamic and properties database designed for use with titanium and TiAl-based alloys. MOBTI6 is the corresponding mobility database needed for use with the add-on kinetic modules.

Technical Information Sheet for TCTI7

Technical Information Sheet for MOBTI6

Validation and Calculation Examples for TCTI7

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TCTI7 Quick Overview

  • PROPERTIES:
    • Gibbs Energy
      • Volume
        • Surface tension of liquid
          • Viscosity of liquid
            • Electrical resistivity
              • Thermal conductivity
                • Elastic constants1
                • ELEMENTS: Ag, Al, Au, B, C, Ca, Ce, Co, Cr, Cu, Fe, Ga, Ge, H, Hf, La, Li, Mn, Mo, N, Nb, Nd, Ni, O, Pd, Pt, Re, Ru, Sc, Si, Sn, Sr, Ta, Ti, V, W, Y, Yb, Zn, Zr
                • ASSESSED PHASES: 480
Properties Calculated

TCTI7 for Thermodynamic and Properties Data

TCTI7 is a thermodynamic and properties database for conventional Ti-based and newly emerging γ-TiAl based alloys. All necessary volume data (including molar volume and thermal expansion) for various solution and intermetallic phases is available in TCTI7.

This database can be used to calculate various phase diagrams and thermodynamic properties in assessed systems, but also to predict stable and metastable phase equilibria (β-transus temperature, evolution of phase fractions vs. temperature, martensitic temperature, and so on) for a wide range of multicomponent alloys of industrial relevance, with light impurities (O, N, H, etc.) taken into account. Ti- and γ-TiAl-based alloys of relevance that can be studied include, but are not limited to:

  • Alpha and near-alpha alloys, such as Ti-6242Si
  • Alpha-beta alloys, such as Ti64
  • Beta or near-beta alloys, such as Ti 10-2-3
  • γ-TiAl based alloys, such as TNM alloys
  • And more

TCTI7 was developed to be used with our entire suite of products: Thermo-Calc, the Add-on Modules, and all available SDKs.

MOBTI6 for Kinetic Data

MOBTI6 is a corresponding mobility database that provides kinetic data for those working with the add-on kinetic modules – the Diffusion Module (DICTRA) and the Precipitation Module (TC-PRISMA) – as well as a few specific calculation types, such as Scheil with back diffusion. If you do not purchase a license for an add-on kinetic module, you most likely do not need a mobility database. One of our technical sales representatives can help you determine whether your work requires a mobility database.

MOBTI6 is compatible and recommended to be used in combination with TCTI7.

Titanium Model Library Free with Purchase of Database

The Titanium Model Library is a package of property models used to set up calculations in the Property Model Calculator that are common to those working in the titanium industry. The library includes two models intended for those working with titanium: Alloy Strength – Ti and Martensite Temperatures – Ti.

The Titanium Model Library is available for free to all users who have licenses for the titanium databases TCTI (version 6 or newer) and valid Maintenance & Support Subscription (M&SS).

Highlights of the Latest Release

The latest version of our Titanium and TiAl-based Alloys Databases, TCTI7 and MOBTI6, were released with Thermo-Calc 2026a, in January 2026.

Ni-free β-Ti based alloys have been developed due to their excellent biocompatibility and low cost. The new elements are added to expand the application possibilities for novel functional materials.

  • 12 new elements: Au, Ca, Ce, Ga, Ge, La, Li, Nd, Sc, Sr, Yb, Zn (40 total)
  • 57 new phases (480 total)
  • 41 new binary systems assessed (320 total)
  • 9 new ternary systems assessed (111 to 120)
  • 7 ternary systems updated to strengthen the reliability in applications of shape memory alloys
  • Several improvements to the thermophysical properties
  • Several other improvements 
Read the Release Notes for more Details

Learn About the Development of TCTI

We are continuously working on improving our databases. Below are three resources that discuss the development of the TCTI database.

Blog Post

Next Generation Database for Greener and More Efficient Aerospace Vehicles

This blog post discusses the development and improvements to TCTI5 facilitated by the ADVANCE Project.

Read now

Publications

Extension of CALPHAD Data for Ti and TiAl-Based Alloys
Yang Yang, Reza Naraghi, Anders Engström, Qing Chen, Carl-Magnus Lancelot
Proceedings of the 15th World Conference on Titanium, Chapter 16: Materials 4.0; Multi-scale Modelling, 10 Oct 2024, Pages 12-16

This publication discusses the development of the TCTI database, particularly the additional thermophysical property data that has been incorporated into the database in recent years, including molar volume, thermal conductivity, electrical resistivity, viscosity and surface tension of metallic liquids. The authors are all Thermo-Calc Software employees.

Note: You must scroll down to page 12 of the document to find the paper.

Read now

Development of CALPHAD database for both Ti- and TiAl-based alloys
Yang Yang*, Hai-Lin Chen, Qing Chen and Anders Engström
MATEC Web of Conferences, Volume 321 Article 12011, October 2020, 20 pages
The 14th World Conference on Titanium

This publication discusses the development of the TCTI2 database. The authors are developers of the database, who are all Thermo-Calc Software employees.

Read now

1: Elastic properties are only available for cubic BCC (A2 and B2), cubic FCC (A1 and L12), and hexagonal HCP (A3) phases.

Applications to Ti/TiAl-based Alloys
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LEARN HOW THE DATABASE WAS UPDATED FOR

Next Generation Database for Greener and More Efficient Aerospace Vehicles

The TCTI database was part of an ambitious experimental program consisting of four partners from three countries and spanning over almost 4 years. The goal of the project was to develop an accurate CALPHAD database that aids the design of lightweight, high-temperature tolerant TiAl alloys used to make aero engine rotating blade parts.

Learn about the ADVANCE Project
thermo-calc-software-solutions>

Applications

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Showcase

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