Properties of High Strength Alpha-Beta Titanium Alloy TIMETAL® 575

TIMETAL® 575 (Ti-575) is a newly developed alpha-beta titanium alloy by TIMET. The alloy provides higher strength than Ti-64 by more than 15% under equivalent heat treatment conditions. The composition of the alloy is essentially a Ti-Al-V system and its density is comparable to that of Ti-64. As a result of the aforementioned characteristics, Ti-575 shows higher specific strength (strength/density ratio) that is a primary advantage in aerospace applications. The alloy also exhibits superior high cycle and low cycle fatigue properties compared with Ti-64 with no dwell sensitivity. The paper will present properties for Ti-575 optimized for strength and a version optimized for improved damage tolerance.