Corrosion of reinforced concrete (RC) beam is initiated by the penetration of liquid through existing cracks which leads to localized corrosion of embedded reinforcement bar. This process results in progressive structural deterioration which is further aggravated by structural under design and prolonged overloading. This research investigates the flexural behavior of corroded RC beams strengthened using two different strengthening materials: near surface mounted (NSM) carbon fiber reinforced polymer (CFRP) strips and iron-based shape memory alloy (Fe-SMA) strips. A total of eight RC beam specimens were fabricated: a control beam (CB), an unstrengthened corroded beam (CRB), a corroded beam strengthened with CFRP strips (CRB-CFRP) and a corroded beam strengthened with Fe-SMA strips (CRB-SMA). Flexural behavior and crack microscopy were examined by four-point bending tests. Flexural test results revealed that both CFRP and Fe-SMA strengthened significantly enhanced the performance of corrosion-damaged RC beam. Compared to unstrengthened corroded RC beam, the beam strengthened with Fe-SMA exhibited the highest first cracking load of 13.4 kN, indicating improved crack resistance and load carrying capacity. Meanwhile, the CFRP strengthened beam also presented significant enhancement with a higher ultimate load and increased crack width capacity relative to the corroded RC beam. These results demonstrate the feasibility of using Fe-SMA as a smart material for strengthening corroded RC beams, and promoting more sustainable infrastructure solutions.