ductility vs. malleability

ductility

[duhk-til-i-tee] / dʌkˈtɪl ɪ ti /

noun

the capacity to undergo a change of physical form without breaking; malleability or flexibility.

High ductility and very low hardness made gold easy to work using primitive techniques.

malleability

[mal-ee-uh-bil-i-tee] / ˌmæl i əˈbɪl ɪ ti /

Sometimes malleableness

the state of being malleable, or capable of being shaped, as by hammering or pressing.

the extreme malleability of gold.
adaptability.

the malleability of an infant's brain.