When laser power density is greater than 12 GW/cm~2,the surface(micro-hardness) of EBW line alters. Mechanical properties of TC4 titanium alloy welding line will be improved by LSP.

• 当激光冲击的功率密度大于12 GW/cm2时；激光冲击强化处理使电子束焊缝区的表面层硬度明显改变；改善了焊缝区域硬度的分布；有利于提高TC4钛合金焊缝区的机械性能.