This master´s thesis deals with the issues of electroerosive machining material used in aerospace industry. The master´s thesis is divided into the theoretical and practical part. In the theoretical part is described electroerosive machining with a focus on electrical discharge sinking. One section of the theoretical part is an analysis of materials used in the aerospace industry. The practical part of the master´s thesis is focused on electrical discharge sinking of aerospace material INCO 713LC, here is investigated the influence of machining parameters on the surface of the workpiece and tool.