Abstract: Influences of the curvature radius of the hypersonicleading edge on the evolution of temperature, stress, and deformation arestudied in this paper. Firstly, the hypersonic aerodynamic heating model isestablished to determine the thermal environment of the leading edge made of niobium alloy by the finite volume method. Secondly, thetemperature field, stress field, and deformation field of the leading edgewith their evolution are obtained by the finite element method. Thenumerical results reveal that the evolution of the temperature field isclosely related to the curvature radius. The stress value of the leadingedge during the aerodynamic heating process reaches the maximum when the curvatureradius is 1\,mm; the displacement increases with the increase ofthe curvature radius.