Shot peening (SP) can modify the surface properties of titanium alloys and titanium matrix composites (TMCs). Based on our previous work in the last ten years, the microstructure and mechanical properties of SP treated Ti-6Al-4V (TC4) and (TiB+TiC)/TC4 are summarized in this review. The compressive residual stress (CRS) was formed on the surface after SP. At different SP intensities, the thickness of the surface CRS layer was improved with increasing SP intensities. During the stress peening, the CRS increased evidently, and the increment was proportional to the prestress. Besides, CRS’s thermal relaxation was investigated, which showed that the CRS in the whole deformation layer was relaxed. The relaxation mechanism could be explained by the Zener-Wert- Avrami model. The microstrain, the domain size, and the dislocation density of the peened layer were investigated using the Voigt method. The domain size of TC4 was smaller than the composite, and the microstrain of the TC4 was higher than the composite. The average dislocation density was increased after SP due to the existence of reinforcements. Utilizing the Rietveld method to analyze the microstructure after SP, the variations were similar to the Voigt method’s results. Also, the composite’s stability was higher than TC4 because of the existence of reinforcements. Hardness analysis revealed that the existence of reinforcements raised the hardness. In the peened layer, the surface’s hardness was maximum, and it decreased with the increase in depth. At the same temperature, the hardness of the TC4 was smaller than the composite counterpart. Finally, the strengthening mechanism of SP was discussed and summarized based on the above analysis.

喷丸处理（SP）可以改变钛合金和钛基复合材料（TMC）的表面性能。在过去十年的工作基础上，本文对经SP处理的Ti-6Al-4V（TC4）和（TiB + TiC）/ TC4的组织和力学性能进行了总结。SP后在表面形成压缩残余应力（CRS）。在不同的SP强度下，表面CRS层的厚度随SP强度的增加而提高。在应力喷丸过程中，CRS明显增加，且增量与预应力成正比。此外，对CRS的热松弛进行了研究，结果表明整个变形层中的CRS都松弛了。弛豫机制可以用Zener-Wert-Avrami模型来解释。微应变，畴尺寸，用Voigt方法研究了喷丸层的位错密度。TC4的畴尺寸小于复合材料，而TC4的微应变高于复合材料。SP后由于增强材料的存在，平均位错密度增加。利用Rietveld方法分析SP后的微观结构，其变化与Voigt方法的结果相似。另外，由于存在增强材料，因此复合材料的稳定性高于TC4。硬度分析表明，增强材料的存在提高了硬度。在喷丸层中，表面硬度最大，并且随着深度的增加而降低。在相同温度下，TC4的硬度小于复合材料的硬度。最后，