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The SiCw/Al composite specimens were treated by warm peening,stress peening and compound peening,respectively.Residual stress distributions of those specimens were investigated via X-ray diffraction method.Results revealed that comparing with conventional peening; warm peening can increase the maximum residual stress,the depth of compressive residual stress layer and improve stability of residual stress field.Meanwhile,stress peening can increase all characteristic parameters of residual stress field efficiently.Compound peening combines the positive effects of warm peening and stress peening,and has the most strengthening effects.