The book presents the state-of-the-art of biomaterials used in the human body and reports new research on various Ti-based alloys with non-toxic elements (Mo, Zr, Ta, Si, Nb, etc.) aimed at improved mechanical properties, corrosion resistance and biocompatibility. Specific laboratory tests are reported for structural characterization, mechanical properties and corrosion resistance testing, and cytotoxicity assessment. Keywords: Titanium Alloys, Biomedical Materials, Cytotoxicity Assessment, Biocompatibility, Production and Properties of Ti-Mo-Zr-Ta Alloys, Surface Modification, Powder Metallurgy, Characterization of Ti-Mo-Zr-Ta-Alloys, Mechanical Properties, Differential Scanning Calorimetry, Electrochemical Behavior, Optical Microstructure, X-ray Diffraction, Thermal Characterization, Corrosion Resistance, Medical Applications.