Hardness of Common Titanium Alloys

The hardness of titanium alloys can vary depending on the specific alloy composition and heat treatment processes. Generally, titanium alloys are not as hard as some steel alloys, but they exhibit a good balance of strength and toughness.

The following table provides a list of Brinell hardness (HB) values for common titanium alloys at room temperature (approximately 20°C or 68°F).

Hardness of Wrought Titanium Alloys (Annealed)
UNS numberComposition
Grade 1R50250120
Grade 3R50550225
Grade 4R50700265
Grade 5R56400Ti-6Al-4V379
Grade 6R54520Ti-5Al-2.5Sn320
Grade 7R52400Ti-0.2Pd160 - 200
Grade 9R56320Ti-3Al-2.5V256
Grade 11R52250Ti-0.2Pd120
Grade 12R53400Ti-0.3Mo-0.8Ni180 - 235
Grade 16R52402Ti-0.06Pd160 - 200
Grade 17R52252Ti-0.06Pd120
Grade 19R58153Ti-8V-6Cr-4Mo-4Zr-3Al351
Grade 23R56401Ti-6Al-4V (ELI)326
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018.