With increasing interest in sustainable development, researchers are concerned to create alternatives to contribute to the preservation of the environment by developing sustainable and quality materials. In this work, composite materials of polymer matrix with red mud insertion in 10, 20, 30 and 40% fractions and red mud hybrid composites were developed in fractions of 10, 20, 30 and 40% and bamboo fibers in the fraction of 3 % in the length of 30 mm treated and not chemically treated, the synthetic materials used were: polymer resin isophthalic polyester, cobalt accelerator, catalyst and release agent. Ten (10) test specimens were made for each fabricated series using the hand lay-up method, which were submitted to evaluation by means of tensile tests to determine the mechanical properties of the materials. The mechanical test performed on the composites obeyed the standard ASTM D-3039, after being tested the test specimens were submitted to fracture surface analysis by scanning electron microscopy (SEM). The results showed that there was an increase in the resistance limit of the composites in relation to the full matrix. The best resistance limit results were: 36.63 MPa in the fraction of LV 20% of residue, 28.85 MPa in the fraction of LV 10% + FTR3% for hybrid composites residue / fiber with chemical treatment and 31.06 MPa in the fraction of LV 10% + FNT3% for hybrid composites residue / fiber without chemical treatment. The morphological analyzes of the fracture surfaces were efficient because they showed the predominant faults, such as fiber pullout, rupture, cracks and voids.
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