Metal-FRP (fiber reinforced polymer) hybrid circular toroidal pressure vessel (TPV) can withstand higher internal fluid pressure compared to a metal TPV of the same thickness. The design of hybrid metal-FRP TPV needs prediction of the stresses and strains induced in the base metal and FRP layers. Existing predictive models for metal TPV based on linear membrane theory are inadequate in obtaining non-singular displacements at the apex in the meridian of the TPV. Further, they are not applicable for metal-FRP TPV. Therefore, a theoretical solution based on a modified linear membrane approach is proposed for a metal-FRP hybrid circular TPV subjected to an internal pressure. The proposed solution is validated through numerical simulations based on three-dimensional finite element analysis (FEA). Subsequently, a parametric study is conducted to understand the effect of the CFRP's modulus and number of layers, thickness of base metal and R/r ratio (radius of the toroid to its cross-section) on the behavior of the aluminium-CFRP hybrid TPV. The comparison of results in an illustrative case and parametric studies show that the predictions from the proposed model are in good agreement with FEA results. © 2023 Elsevier Ltd