A tensile testing machine, also known as a universal testing machine, is a device used to measure the mechanical properties of materials. It is commonly used in manufacturing, research and development, and quality control to determine the strength, elasticity, and ductility of materials such as metals, plastics, rubber, and composites.

The machine works by applying a controlled tensile force to a sample of the material being tested. The sample is typically in the form of a standardized specimen, such as a rectangular or cylindrical shape with specific dimensions. The machine records the amount of force applied and the resulting deformation or elongation of the sample.