<div> Surface modification can reduce manufacturing and maintenance costs, leading to improved component performance, reliability and lifetime. Friction based technologies are promising solid state processing technologies, particularly for light alloys, in the manufacturing of composite surface and functionally graded materials. The editors and expert contributors describe friction based surfacing techniques for surface modification to improve resistance to corrosion and wear and to change surface chemistry. This book is divided into six chapters, with contributions covering friction surfacing, friction stir processing, surface reinforcements of light alloys, aluminum alloys, magnesium alloys, and characterization techniques based on eddy currents.</div>