Concrete is considered as brittle material with low flexural strength, which makes it susceptible to sudden failure at allow levels of load. As a result, it is necessary to reinforce and strengthen the concrete beams with different strategies to achieve structural stability. This study aims to investigate the behavior of concrete beams when reinforced with steel fibers and strengthen with carbon fibers plates and texture for the same specimen details and under the same testing conditions. The experimental work was conducted by constructing eight (100x100x400mm) concrete beams in order to study the variables; the percentages of steel fiber 0.5%, 1.0%, and 1.5%, the number of sheets in carbon fiber plates and texture (one and two layer). The experimental results showed an increase in the ultimate flexural load by 12.76, 26.10, and 55.85% when beams were reinforced with steel fiber by 0.5, 1.0, and 1.5% respectively, also a noticeable improvement of ductility and reducing deflection was observed. Strengthening by carbon fiber texture further improved the flexural strength of the beam, as the ultimate load was increased by about 61.40% when strengthen with one sheet and 130% when using two sheets. The beams also showed high plastic deformation before failure. The maximum improvement was recorded when the beams strengthen with carbon fiber plates, where the increase in failure load reached 180% and the deflection decreased by 92%, although it led brittle failure and reduced ductility.
