Abstract:y reference to the test standard on bulletproof clothing of American Association for Justice(AAJ),the bulletproof properties of uncovered target plates of a new Ti-120 alloy were studied,and compered with pure titanium TA2,stainless steel,Nylon and keviar etc.The results showed that the new alloy,which has lighter density than steel and cheaper.than Nylon,keviar,has a good resistance to perforation and small hollow of shell crater.Therefore,the Ti-120 alloy plate with thickness of 2.6mm will be ideal materials of bulletproof clothing