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Friction Stir Welding (FSW) has been applied to AA5754-H111 alloy. An in-depth analysis of the influence of the process parameters has been performed using Taguchi method. Through the optimization of the process parameters it has been observed what the best process conditions for the different mechanical properties. It was observed that for tensile properties the best that lower advancing speeds and lower applied forces would be more beneficial to obtain a better tensile behavior. On the other hand, the higher advancing speeds and higher applied forces have proven to give a better bending behavior. The optimization algorithm has proven to be efficient giving welded samples with 98% efficiency, very close to the base material behavior. The corrosion testing has proven that these alloys are very resistant to corrosion although some caution should be taken regarding the “root defect”.