Functionally Graded Materials (FGMs) are multifunctional materials which exhibit spatial variations in composition and microstructure; created for the specific purpose of achieving variations in thermal, structural or functional properties. They are presently at the forefront of materials research and are receiving worldwide attention. They enjoy a broad range of application; including, for example, biomechanical, automotive, aerospace, mechanical, civil, nuclear and naval engineering. New applications are continually being discovered and developed.