Effects of Ta

Zr on properties and microstructure of solid solution Ti alloy were investigated by analyzing Ti-ANb-Ta

Ti-ANb-BTa-Zr series alloys. Solid solution Ti-ANb-Ta

Ti-ANb-BTa-Zr series alloys exhibit lower elastic modulus in which the lowest value is 58 GPa and excellent plastic performance in which maximum value of elongation and contraction of area reach 32% and 80%

respectively. With increasing in Ta and Zr contents

tensile strength of the alloys is increased in range of 500

7

00 MPa. Microstructure of the solid solution alloy is composed of residual β phase and acicular martensite α″

in which with increasing in Ta and Zr

residual β phase is increased with the decrease of acicular martensite α″.