Yes, Tritan plastic can be joined using spin welding. Spin welding is a commonly used joining method for thermoplastics, including Tritan. The process involves rotating one part while pressing it against another stationary part with high force and high speed. The friction generates heat, which melts the plastic and causes it to fuse together when the rotational motion is stopped. Spin welding is especially useful for joining parts with circular or cylindrical geometries, such as bottles, containers, and fittings. The process is fast, precise, and repeatable, making it a popular choice for high-volume production.