<p>Fiber-reinforced polymer (FRP) rebar has demonstrated remarkable resistance to corrosion with minimal degradation, making it a potential alternative to steel reinforcements. This study aims to introduce hybrid Glass Fiber Reinforcement Polymer (GFRP) bars, in which a central core made of superelastic polyurethane foam was injected into GFRP bars. The paper also offers the details of the manufacturing procedure of innovative hybrid bars associated with GFRP composite sleeve filled with hyperelastic polyuretaine foam as central core. The current work presents an experimental investigation to evaluate the bending performance of RC beams reinforced with steel bars, GFRP bars, and the proposed hybrid bars. The obtained results are presented in terms of applied load versus mid span deflection curves. Apparently, the beams reinforced with hybrid bars demonstrated superior energy absorption as compared to the RC beams reinforced with the conventional GFRP bars. Therefore, the concrete beams reinforced with the hybrid bars exhibited greater ductility in relation to those which were reinforced using GFRP only. In this regard, the experimental measurements revealed the ductility index of the concrete beams reinforced with hybrid bars filled with 8-mm diameter of polyurethane foam core was 42% higher than that of the concrete beams reinforced with hybrid bars filled with 4-mm diameter polyurethane foam core and 86% greater than those reinforced with GFRP rods only.</p>