The aim of the thesis has been to develop a solid methodology to optimize complex aviation components according to Additive Manufacturing process. Different optimization techniques available in literature are analysed to choose the best one to be applied to specific case. It is clearly impossible to consider entire model connected to the object of optimization but considering boundary conditions in precise way is a necessity. For this reason, reduction has been developed and has been taken into account during the simulation of the real test case. For this thesis, special consideration has been done for redesign an aircraft component that can be lightened.