capable of being shaped or bent or drawn out; "ductile copper"; "malleable metals such as gold"; "they soaked the leather to made it pliable"; "pliant molten glass"; "made of highly tensile steel alloy"
You use tensile when you are talking about the amount of stress that materials such as wire, rope, and concrete can take without breaking; a technical term in engineering. Certain materials can be manufactured with a high tensile strength. able to be stretched without breaking