In order to meet the challenges of manufacturing sophisticated components in modern space, transport, nuclear, electronic and computer technology applications, many newer manufacturing methods have been developed. Metal cutting processes using thermal energy play an important role in modern manufacturing, especially in the metal cutting industries. The complexity of such processes requires a good understanding of physics, mathematics, material science, thermal and fluid science, computers, and computational techniques. This publication discusses the basic principles of different thermal cutting processes in depth. The equipment and applications are addressed as well. The analysis of a cutting process with multiple process variables is complicated and reliable optimizing techniques are essential for its useful application. Useful techniques like Artificial Neular Network, multivariant regression analysis, ED ´ A and SEM methods are illustrated for a better understanding of the intricacies of these processes. The book is aimed at students, researchers, practicing engineers, and professionals in the metal cutting industry.