Titanium Specifications

Titanium specifications define properties of pure titanium and titanium alloys.

Owing to the allotropic behavior of titanium which allows diverse changes in its microstructures, a broad range of properties and applications can be served with a relatively limited number of titanium alloy grades.

Many titanium alloys are produced to meet specifications established by the American Society for Testing and Materials (ASTM), aerospace titanium specifications (SAE-AMS), military specifications for titanium alloys (MIL-T), and titanium specifications developed by the American Society of Mechanical Engineers (ASME). Diverse US systems of titanium specifications are harmonized through the Unified Numbering System (UNS), which assigns metals and alloys a lettered prefix and a five-digit number. Titanium and titanium alloys belong to the UNS R5 category and have designations such as UNS R50400.

Important international titanium specifications include ISO, Euronorm, Russian GOST, and Japanese JIS. Although there is an overlap between standard specifications for titanium, they are not interchangeable. The Japanese Titanium Society, in its efforts to achieve a more global approach, has made representations of unified systems of titanium specifications.

The primary challenge with titanium specifications is not a lack of standard specifications defined by standards development organizations (SDOs), but the addition of detailed, individual titanium specifications developed by the aerospace companies which have relatively limited production runs. Each aerospace company has its own specifications for titanium alloys which require specific, proprietary process routes. Consequently, there are many titanium specifications circulating that are only relevant (and understood by) a select group of participants. In other words, many titanium specs are not standardized.



The Total Materia database brings global metal properties together into one integrated and searchable database. Quick and easy access to the mechanical properties, chemical composition, cross-reference tables, and more provide users with an unprecedented wealth of information. Click the button below to test drive the Total Materia database.

Titanium Specifications in Total Materia

The Total Materia database includes property specifications for more than 4000 titanium alloys along with another 350,000 metal alloys from all over the world. Their chemical compositions, mechanical and physical properties, cross-references and more are only a click away.

Finding a titanium grade in the database is very easy and takes seconds. For example, let’s look into the properties of the Japanese titanium grade TAF 6400.

Simply use Quick Search at the Subscribers Home page and enter the designation. Selecting titanium from the Alloy Group list and Japan/JIS from the Standard list is optional.

Titanium grades: Search for the Japanese titanium grade TAF 6400

After clicking on the material, a list of subgroups appears. In Total Materia, the term “subgroups” refers to specifications that define properties of the titanium grade; in this case there is only one specification – JIS H 4657. Note that properties defined according to different specifications may differ significantly.

Titanium grades: Specification that defines properties of the Japanese titanium grade TAF 6400

Composition, cross-references and properties of the titanium grade TAF 6400 can then be reviewed by clicking appropriate links, see examples below.

Titanium grades: Chemical composition of the titanium grade TAF 6400
Titanium grades: Cross-reference table of the titanium grade TAF 6400
Titanium grades: Mechanical properties of the titanium grade TAF 6400