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在切削力作用下硬脆颗粒增强金属基复合材料内部应力分布不均匀，基体发生弹性变形—塑性变形，增强颗粒发生弹性变形并可能破碎，然后基体夹裹颗粒协调变形并流动．在成屑的层积阶段剪切变形区和层积区中易生裂纹，其后裂纹在切削层中可能沿基体—增强颗粒结合界面扩展、颗粒穿晶解理或破碎、绕过颗粒只在基体中扩展．复合材料的组织和性能，尤其增强颗粒的含量、粒度和与基体的界面结合强度是影响其切削变形的主要因素．
Under the action of cutting force, the internal stress distribution of the hard and brittle particle reinforced metal matrix composites is not uniform, the matrix is elastically deformed and plastic deformed, the particles are deformed elastically and may be crushed, and then the matrix particles co-deform and flow. Shear deformation zone and stratified zone in the stratified into debris susceptible to cracks, and then the crack in the cutting layer may be along the matrix - enhanced particle bonding interface, the particle transgranular cleavage or crushing, bypassing the particles only in the Matrix expansion. The microstructure and properties of the composites, especially the content of the particles, the particle size and the interfacial bonding strength with the matrix are the main factors affecting the cutting deformation.