Manufacturing Engineering Society International Conference (MESIC 2011) continues the tasks of the three previous conferences and will accomplish one of the objectives of the Manufacturing Engineering Society: the knowledge spreading in the scope of Manufacturing Engineering. Papers included in these Proceedings have been peer reviewed and come from a meeting of professionals and researchers from industry and academia, where recent advances in the field of Manufacturing Engineering have been presented and discussed in topics as Manufacturing Processes, Manufacturing Systems, Metrology and Industrial Quality, Welding and Joining Technologies, Materials Processing, Production Engineering and Manufacturing Modeling and Simulation. Manufacturing Engineers, Production Engineers and Industrial Engineers form, therefore, the main audience of the MESIC 2011 Proceedings.