The necessity of using titanium and titanium alloys in ship construction is expounded,the types,applications and weld ability of titanium alloys used in naval ships are reviewed. Then the characteristics and adaptability of advanced welding technology of ship titanium alloy,such as TIG,electron beam,laser welding, are described,the problem in material,process and equipment of titanium alloys used in naval ships are pointed out. Finally,it is proposed that attention should be paid to advanced titanium alloy materials preparation process and automatic,intelligent equipment development.