Which of the following is not a property of ductility?

Ductility is a property of materials that describes their ability to deform under tensile stress, allowing them to be stretched or drawn into thin wires without breaking. Among its key characteristics are the ability to deform in the plastic range, resistance to breaking under stress, and the capacity to undergo large strains.

The ability to conduct electricity, while crucial for certain materials such as metals, does not define ductility. Instead, it relates to the electrical properties of materials, influenced by their atomic structure and electron mobility, rather than their mechanical behavior under stress. Thus, this option correctly identifies a feature that is unrelated to the concept of ductility.