ductility vs ductileness

ductility and ductileness both are nouns.

Word	Noun	Adjective	Verb	Adverb
ductility	Yes	No	No	No
ductileness	Yes	No	No	No

As nouns, ductility and ductileness are synonyms defined as:

ductility and ductileness: the malleability of something that can be drawn into threads or wires or hammered into thin sheets

ductility (noun)	ductileness (noun)
the malleability of something that can be drawn into threads or wires or hammered into thin sheets	the malleability of something that can be drawn into threads or wires or hammered into thin sheets