What does ductile mean?
Ductile is an adjective describing a material's ability to deform under stress — particularly to be stretched into wire or hammered into thin sheets — without breaking. It is chiefly used in metallurgy, physics, and engineering, where ductility is a measurable property: metals such as copper, gold, and aluminium are notably ductile, while cast iron and glass are brittle and will shatter rather than stretch. The word also has a figurative sense applied to people, describing someone who is easily influenced or shaped by others; this use tends to sound literary and carries a faintly critical tone, implying a lack of independent firmness. Ductile comes from the Latin ductilis, from ducere, meaning 'to lead or draw', which also gives English words such as conduct, produce, and educate. In everyday speech the near-synonym malleable is more common, though technically malleability refers to hammering into shape rather than drawing out into wire.
Able to be drawn out into wire or hammered thin without breaking; capable of being shaped or deformed without fracture.
"Gold, the most ductile of all metals, can be stretched into threads finer than a human hair."
Standard in metallurgy and materials science; contrast with brittle.
Readily led, influenced, or moulded; tractable.
"He was a ductile pupil, absorbing whatever opinions his teachers offered."
Literary and somewhat dated; often implies excessive pliability.
Gold is the most ductile metal known — a single gram can be drawn into a wire over two kilometres long.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of ductile
Ductile derives from the Latin ductilis, meaning 'that may be led or drawn', formed from ducere ('to lead, draw'), plus the adjectival suffix -ilis. It entered English in the late Middle English period via Old French, first appearing in the 14th century in senses relating both to physical malleability and to personal pliability. The same Latin root ducere underlies a wide family of English words, including conduct, deduce, educate, and produce, all preserving some notion of leading or drawing forth. Its noun form, ductility, developed alongside it and remains standard in scientific usage today.
Related word forms
How ductile is actually used
Predominantly a technical and formal word. In materials science and engineering it carries a precise, neutral meaning describing how a material behaves under tensile stress. The figurative sense describing an impressionable person is literary and somewhat old-fashioned, and usually implies mild criticism — suggesting someone too willing to be moulded by others.
Easily confused with ductile
Malleable describes material that can be hammered or pressed into shape (sheets), whereas ductile specifically describes material that can be stretched or drawn out into wire.
Ductal is a medical term meaning relating to a duct (as in ductal carcinoma), while ductile describes the physical property of being stretchable or mouldable.