ABSTRACT: The objective of this work is to effect a comparative study of the mechanical behavior of composite plates with [+θ/-θ] 3S stacking sequence and subjected to tensile loading. The strength of these various composites is ensured by the choice of the components and the adequate arrangement of fibers. The ultimate strength of regular symmetrical laminates will be predicting by the use of a mathematical approach based on the suitable failure criterion. The different obtained results show a variability of the mechanical behavior according to the more or less pronounced anisotropy degree. They permit to propose hybrids able to improve strength of mat composites by the association of the unidirectional or woven fabric reinforcement. The use of the hybridization technique involves the optimal structures and improvement of the mechanical performances of composites materials.