Abrasive waterjet machining has many advantages, such as high machining versatility, small cutting forces, almost no heat generated and low machining cost. However, there is a few of study on erosion mechanisms and precision polishing technology for hard-brittle materials with abrasive waterjet. Therefore, in this thesis, erosion mechanisms and brittle-ductile transition mechanisms of hard-brittle materials machined with abrasive waterjet are studied, material removal models of fracture and duc...