In superconducting magnet and coil applications, joints are used to connect lengths of superconducting tapes and to complete the windings. Certain coated conductor (CC) joint properties, such as joint resistance ( R j), must be considered during the design phase. Ultimately, the joints must meet all electrical and mechanical requirements. In this study, the parameters for ultrasonic welding (UW) of differently stabilized rare-earth barium copper oxide CC tapes were optimized using the Taguchi method. Along with critical current ( I c), R j was measured at 77 K in joints formed using various types of CC tapes. Bending performance of the joints was measured as a practical evaluation for coil winding. Retained $I_{c}$ showed no degradation after the UW process. Resistance at the joint was in the range of 100 to 200 nΩ (joint resistivity, about 120–240 nΩ·cm2). Bending tests showed that a bending diameter of 50 mm was tolerated without $I_{c}$ degradation. Surface morphologies of the cross-sections and joint interfaces were observed and revealed an explanation for the behavior of R j with bending.