<p>This study investigates the thermo-mechanical buckling behavior of sandwich curved beams incorporating various material configurations in their core and surface layers, including functionally graded materials (FGMs), metals, and ceramics. The beams are modeled using a sinusoidal higher-order shear deformation theory, and the governing equations are derived through Hamilton’s principle. These equations are solved in an eigenvalue framework using the Navier method. In the numerical analysis, Inconel 718 is employed as the metallic component due to its high thermal stability, while Alumina (Al₂O₃) is used as the ceramic material for its superior thermal properties. Seven different sandwich beam configurations are considered by varying the material distribution in the core layer. A comparative assessment of two specific CFC (ceramic-FGM-ceramic) curved beam configurations reveals that the thermal buckling temperature of the CFC-I model is 22.78% higher than that of the CFC-II configuration for the case of p = 1. This improvement is attributed to the increased volume fraction of ceramic material in the CFC-I configuration, which significantly enhances thermal stability due to the inherently superior thermal resistance of ceramics over metals. The study further highlights that configurations dominated by ceramic constituents in both the core and surface layers exhibit markedly higher thermal resistance compared to their metal-dominated counterparts.</p>