This book addresses the challenges of using metallic biomaterials in implants. It delves into the selection process for these materials, considering factors like mechanical strength, biocompatibility, and resistance to wear and tear. However, the primary focus is on understanding and combating corrosion. Different types of corrosions are explored, highlighting their mechanisms and potential consequences. Existing research on surface modification techniques is reviewed, offering methods to improve the longevity and safety of implants. The book then introduces the exciting world of additive manufacturing (AM), a revolutionary technique for creating implants. It explores various AM technologies and their suitability for creating biomaterials (metallic’s, ceramics and polymers). Subsequently, the diverse applications of AM in biomaterials and biomedical devices are explored.  The book explores various post-processing methods used to refine parts created with AM. These methods not only improve the surface finish but can also enhance the overall properties of the implant. By analyzing existing research and exploring innovative techniques, this book aims to equip researchers and professionals with the knowledge to develop better metallic biomaterials. Ultimately, the goal is to create implants that last longer, function flawlessly, and offer a safer and more durable solution for patients.