激光冲击强化是一种新型表面强化技术，能够在材料表层产生残余压应力，提高结构件的疲劳强度、表面硬度，延长其疲劳寿命，在钛合金结构件中应用前景广阔。介绍了激光冲击强化的基本原理和特点，并结合国外研究现状，着重分析了我国钛合金激光冲击强化技术在工艺基础研究以及提高疲劳强度、改善焊缝应力状态、表面纳米化、强化孔结构、修复及再制造受损件等方面的研究现状，并指出了该技术在钛合金工程化应用方面需解决的关键问题。
Laser shock peening ( LSP ) is a novel surface treatment technique which is capable of introducing compressive residual stress near the surface layers of the materials , then the fatigue properties and surface strength of the alloy can be improved largely .In this paper , the basic principle and characterization of LSP was introduced , the research situation of the LSP in the field of fatigue strength , improve the stress state of welding seam , nanocrystalline , pore structure strengthening , repair and remanufacturing were analyzed deeply .Finally , the key problems that needed resolved for the engineering application of LSP in titanium alloys were pointed out .
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