This presentation discusses types of tensile testing machines used for fibers and yarns. It describes tensile strength testing of yarns using the USTER TENSORAPID/USTER TENSOJET machine, which tests at high speeds with accuracy. The presentation also covers the three categories of tensile testing machines based on working principles: constant rate of extension, constant rate of loading, and constant rate of traverse. Finally, it discusses tensile strength testing methods for fabrics, including the strip test and grab test, describing sample preparation and test procedures.