The welding of Ti/SS metal foil was realized by laser impact welding. The interface morphology and mechanical properties of welding specimens were studied by systematic experiments, and the experimental phenomena were revealed by smoothed particle hydrodynamics numerical simulation. Results indicated that the plastic deformation of the composite plate and the springback of the welding spot center were small under low laser pulse energy and enlarged under high laser pulse energy. Impinging jet, interface wave, and interface cracking were found at the micro-interface of the welding specimens. Increasing the laser pulse energy resulted in the transition of the interface waveform from straight to microwave and finally to wave primarily because of the change in interfacial impact pressure and effective plastic strain. Energy dispersive spectroscopy analysis showed that the trace element diffused at the welding interface, and no intermetallic compounds were formed. SPH simulation revealed that the thickness of the high-temperature layer was related to the thickness of the diffusion layer. As the distance between the test point and welding interface increased, the hardness decreased. The maximum tensile force of the welding specimens increased with laser pulse energy. The failure mode of the interface was welding spot edge fracture failure.

Ti / SS金属箔的焊接是通过激光冲击焊实现的。通过系统实验研究了焊接试样的界面形态和力学性能，并通过光滑颗粒流体动力学数值模拟揭示了实验现象。结果表明，在低激光脉冲能量下，复合板的塑性变形和焊点中心的回弹较小，而在高激光脉冲能量下，复合板的塑性变形和焊接点中心的回弹增大。在焊接试样的微界面处发现了冲击射流，界面波和界面裂纹。激光脉冲能量的增加主要是由于界面冲击压力和有效塑性应变的变化，导致界面波形从笔直转变为微波，最后转变为波。能量色散光谱分析表明，微量元素在焊接界面扩散，没有形成金属间化合物。SPH模拟表明，高温层的厚度与扩散层的厚度有关。随着测试点和焊接界面之间距离的增加，硬度降低。焊接样品的最大拉力随着激光脉冲能量的增加而增加。接口的失效模式为焊接点边缘断裂失效。硬度降低。焊接样品的最大拉力随着激光脉冲能量的增加而增加。接口的失效模式为焊接点边缘断裂失效。硬度降低。焊接样品的最大拉力随着激光脉冲能量的增加而增加。接口的失效模式为焊接点边缘断裂失效。