Taking Ti 80 ally as the base alloy,the Ti-5.5Al-3.0Nb-3.0Zr-1.2Mo alloy was proposed.The heattreated microstructure of theoptimized composition alloy presents a uniform basket-weave,and its mechanicalproperties and electrochemical corrosion performance is desirable.After adding 0.3Ni to the optimized component alloy,the microstructure is refined,adn strength and electrochemical corrosion performance are further improved,while the plastic toughness is reduced