 Laser cavitation peening, LCP, is a new technique used to enhance the fatigue strength of metallic materials. It involves generating a bubble in the material being processed, which is then compressed by the shockwave created by the laser pulse. This process results in work hardening and compressive residual stresses, both of which increase the fatigue strength of the material. Additionally, three-dimensional, 3D metals such as titanium alloys have been shown to benefit from LCP, resulting in improved fatigue strength compared to traditional bulk metals. This article was authored by Hitoshi Soyama and Yuka IGA.