RS TENSILE PVT IN DELHI Tensile strength is the maximum amount of tensile stress a material can withstand before it fails or breaks. It is a measure of the material's ability to resist deformation under tension or stretching forces. When high tensile loads are applied, ductile and brittle materials will approach failure. This process begins with a uniform deformation throughout the sample followed by an increase in length and a decrease in width at the same rate.