Titanium alloy of Ti-6Al-4V-2Cr contained different Mo was prepared by the cold isostatic pressing and vacuum sintering.Effects of varied Mo content on microstructure and mechanical properties of the alloy were investigated by OM

XRD and SEM

tensile testing.The results show that the relative density of the alloy with different Mo content reaches over 98%

and it is the most dense with the Mo content of 1.5%.The microstructure of the alloy is varied with different Mo content.When the Mo content is less than 1.5%

the morphology of the alloy consists of coarse equiaxed grains

and they will be refined gradually along with the increase of Mo content.However

when the Mo content is more than1.5%

the morphology shows basket-weave shape.The tensile strength

hardness and elongation of the alloy are increased firstly and then decreased with the increase of Mo content

where they reach 1 054.7MPa、332.7HV、6.1%

respectively

with 1.5% Mo addition.Titanium alloy mainly consists ofα-Ti andβ-Ti phase through the X-ray diffraction（XRD）

and the hard brittle TiCr2 phase can be observed in the microstructure of Ti-6Al-4V-2Cr alloy containing 3.0% Mo

which can reduce the mechanical properties of alloy.