Nickel-titanium (NiTi) shape memory alloys (SMAs) are used in the robotics, aviation, medical, and aerospace industries because of their biocompatibility and smart material properties. NiTi alloys lose some functional properties when appropriate machining parameters are not selected due to their unidirectional and bidirectional shape memory effect (SME) and superelastic (SE) and superplastic nature. NiTi alloys are difficult to machine because of their deformation-hardening ability and high ductility. Therefore, the best machining procedure and machining parameters need to be determined. Owing to their affordability and accessibility to machining, it is still common to process NiTi alloys, which have very low machinability rates, with traditional manufacturing methods. NiTi alloys maintain the desired surface properties during machining because of their high strength and low thermal conductivity, but further research and improvements are needed to minimize cutting tool wear. This section discusses traditional methods of machining NiTi alloys, and a comprehensive analysis of turning, milling, and drilling processes is performed. The effects of cutting tool geometry and coatings, machining parameters, cooling environments, and other machining variables on surface roughness and integrity, tool life and wear, cutting force, and torque in machining NiTi SMAs with different traditional methods have been evaluated in detail. The quality characteristics/responses, such as surface roughness, torque, tool wear, vibration, hardness, and cutting force, of NiTi alloys during and after machining operations have been comprehensively studied and interpreted. This chapter provides important technical information on the machinability of NiTi SMAs, an increasingly used material, that will support and guide academic research and commercial and industrial applications.