Particle-reinforced titanium matrix composites (PTMCs) has great application potentials in aviation and aerospace industries. However

it is a typical difficult-to-cut material. Creep-feed deep grinding experiments were carried out on PTMCs. The effect of grinding parameters and grinding mode on grinding forces and grinding temperatures was investigated. The grinding temperature distribution and materials removal mechanism were discussed by finite element method. The results show that the grinding forces increased with the increasing of the workpiece infeed speed and depth of cut. The grinding forces for down grinding are always 10%~20% higher than that for up grinding

the grinding temperatures for down grinding are always 10% lower than that for up grinding. When the depth of cut is greater than 0.6mm or the workpiece infeed speed is larger than 400mm/min

grinding burn is easy to occur for down grinding because the grinding temperature distribution is different between up grinding and down grinding. Furthermore

heat source model and the boundary condition under the down grinding and up grinding conditions are proposed

respectively. The grinding temperature distribution for two different grinding modes is simulated. The grinding temperature predicted by finite element method agrees very well with the experimental data measured in the current investigation. The main ground-induced defects are adherence and the voids produced due to the fracture and pull-out of the reinforced particles. The undeformed chip thickness per grain has a significant effect on the removal mechanism of the hard-brittle reinforcements of PTMCs during grinding.