The effects of molybdenum addition on the sintering densification and mechanic properties of Ti-Mo alloy were investigated.The expansion/shrinkage characteristic of the alloy was analyzed by a dilatometer.The microstructure and mechanical properties of the alloy were studied by SEM and mechanical property measurement and test.The results show that the addition of Mo can't accelerate the sintering densification,but is beneficial to microstructure refining of Ti-Mo alloy.With increasing of Mo content,the microstructure refining is more and more obvious,resulting in great improving the ambient temperature plasticity of the alloy,the elongation of as-sintered Ti-Mo alloy can reach 23%.