<p>A coupled thermal damage–breakage constitutive model is proposed for the inelastic modeling of cemented granular materials (CGMs). A novel dissipation function and yield criteria are developed to incorporate the thermal effects within the framework of thermodynamics. The thermally induced grain crushing and cement disintegration are introduced through the thermal internal variables that characterize the inelasticity induced by the thermal treatment. A systematic discussion of the model is presented through parameters sensitivity analysis, followed by validation against experimental data. This model provides an effective coupled simulation framework in a conceptual and unified manner, with the ability to capture the thermally induced stiffness degradation and the post-yielding behavior of CGMs.</p>