The pull stress (in force per unit area) required to break a given specimen.

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The maximum amount of tensile stress that can be applied to it before it ceases to be elastic. If too much force is applied the material will break or become plastic, i.e., once the force exertion is stopped the material will not go back to its initial shape.

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The maximum amount of tensile stress that can be applied to it before it ceases to be elastic. If too much force is applied the material will break or become plastic, i.e., once the force exertion is stopped the material will not go back to its initial shape.

Source