Abstract: The wear of the cylinder block walls of aviation piston engines seriously affects the engine power output efficiency and even causes general aviation accident symptoms such as air parking. The surface performance of the remanufactured cylinder block recovered based on surface engineering technology lacks engineering verification, and the accurate and comprehensive assessment of the surface wear risk can indirectly reduce the accident rate and improve the safety of aviation operation. Based on the viscoelastic intrinsic model of ceramic phase coating with oxidation weight gain model and Cr-Mo alloy deformation intrinsic model, the thermal fatigue life model of TiO₂-CNTs combined with 42 CrMo alloy level was established. The results show that the coating shear stress, equivalent force and intermediate elastic main strain and thermal strain change characteristically with the change of stroke under the cruise condition of aviation piston engine. The 3D cylinder block-coating simulation model is subjected to the fatigue life, which is maintained at 3.94 ×10⁸h, the coefficient of safety of 0.725. When subjected to a radial load of 0.2 MPa and changed cylinder pressure（maximum 38936 N）, at a sensitivity of 0.5, the fatigue life reaches 3.0 ×10⁹h, and at a fatigue sensitivity factor of 1.5, the available life is only 5.0 ×10⁸h. The model can more accurately evaluate the thermal stress, thermal strain and thermal fatigue life of the bond, which is a practical guide for further engineering applications of TiO₂-CNTs coatings.