An optimization of load paths in hydroforming of angled tubes are investigated through statistical methods in conjunction with FEA and simulated annealing algorithms. The main aim of this study is to improve the tube formability by applying the optimal load parameters. A new method to design the optimal load paths is represented and it is applied to optimize the load curves in hydroforming of X- and Y- tube shapes. By the aid of proposed method, the tube is formed with good formability indicators and lower capacity of equipments. Comparing the results of this study with the experimental data confirm the effectiveness of the method.

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