The present work investigated the mechanical behavior of normal and highstrength Strain Hardening Cementitious Composites (SHCC) reinforced with PVA, UHMWPE (ultra-high molecular weight polyethylene), steel and hybrid fibers. For the study, the total volume of fibers was kept constant at 2.0 percent in order to maintain the workability of the composite system. PVA and polyethylene were partially replaced by steel fibers in 0.5 percent and 1.0 percent. The mechanical response was measured under direct tension tests, four-point bending tests on plates and three point-bending tests on notched specimens. The crack pattern was investigated using high resolution image capturing procedure. The size-effect of the composites reinforced with PVA and polyethylene fibers was also investigated under direct tension test and four-point bending tests using two sizes of specimens. The results have shown that PVA fibers have a better performance than polyethylene fibers for normal strength matrices and that for both normal and high strength matrices the partial replacement of polyethylene and PVA fibers by steel fibers has the benefit of increasing the strength, but it reduces the strain capacity of the composites. The investigation about the size-effect also have shown that mechanical response of these composites changes with the geometry of the specimens. Finally, the composites were used as structural repair in beams subjected to previous damage and the results verified the feasibility of SHCC as a repair material.