Tensile testing is a method used to determine how materials respond to stretching forces. In this test, a sample material, such as metal or plastic, is pulled apart until it breaks. The test measures important properties like tensile strength, which indicates how much force a material can withstand before failing, and elongation, which shows how much a material can stretch before breaking. The results from tensile testing help engineers and designers choose the right materials for various applications. By understanding the behavior of materials under tension, they can ensure that structures, like bridges or buildings, are safe and reliable. This testing is crucial in industries such as construction and manufacturing.