Metastable beta titanium alloys have been studied for over two decades to explore their applicability in production of joint implants. The aim is to suppress the Young's modulus to a value close to that of bone (10 - 30 GPa).
At the same time, strength requirements for the construction of the implant should be met, e.g. yield strength of at least 900 MPa as in currently used Ti-6Al-4V alloy.