This study examines the thermo-mechanical bending behavior of functionally graded (FG) plates, considering both perfect and imperfect configurations. The displacement field involves only four variables while satisfying the stress boundary conditions on the plate surfaces. The porosity is assumed to be uniformly distributed across the cross-section. The equilibrium equations are derived using the principle of virtual work, incorporating both thermal and mechanical effects. The model is validated through numerical comparisons with existing literature data. Parameters such as aspect ratios and porosity volume fractions are examined in detail to assess their influence on the bending and thermo-mechanical responses.