Ductility involves determining the extent by which a material can withstand plactic deformation without rupture.

With a ductile fracture, there is a considerable amount of plastic deformation prior to failure. In metals, for example, the fracture shows a typical cone and cup formation and the fracture surface appears rough and fibrous. Ductile materials show a measured amount of plastic deformation prior to fracture.

Ductility testing can be carried out on a range of Lloyd Instruments materials testing machines together with NEXYGENPlus data analysis software when more comprehensive testing results are required.

Typical graph showing ductility test.

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