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The elastoplastic properties of TiC particle reinforced titanium matrix composites (TiC/TMCs) at high temperatures were analyzed by considering interfacial debonding.Based on Eshelbys equivalent inclusion theory and Mori-Tanakas concept of average stress in the matrix, the stress or strain of the matrix, the particles and the effective stiffness tensor of the composite were derived under prescribed traction boundary conditions at high temperatures.