Laser engraving and laser milling have become widely established commercial activities and have been applied to many different types of metals. As a non contact process, laser micro-machining offers many advantages over conventional mechanical processing technologies. Although compared with conventional milling methods material removal rates of a few 10s of mm3/min may seem low, their use is targeted at micro-machining where the feature size and process control offered by laser sources are not achievable with conventional tool based machining methods.