This book deals with synthesize high quality nanocoatings thin films of alumina, titania, and alumina/titania multilayers with 25 nm and 50 nm thickness by Atomic Layer Deposition (ALD) method on different implantable orthopedic alloys ( Co-28Cr-6Mo ASTM F75 and Stainless steel 316L), and then characterization the structure of thin films by advanced nanotechnology methods and facilities, study the localized corrosion resistance in SBF, determine the biocompatibility, and demonstrate the bioactivity.