Magnesium alloys have been utilized extensively due to its various features; its density is low, it is malleable, easily available and one of the most machinable metals. This has led to an increase in magnesium alloys applications. A study of magnesium alloys related to technological functions and environmental requirements has been discussed in this book. Various diverse applications of magnesium alloys, for example, enhancing the malleability of some specific magnesium alloys, molding magnesium alloys, etc. have also been elucidated. This book will be helpful for readers interested in increasing their knowledge about magnesium alloys.