Source : Webster's Revised Unabridged Dictionary (1913)

Malleability \Mal"le*a*bil"i*ty\, n. [CF. F.
   mall['e]abilit['e].]
   The quality or state of being malleable; -- opposed to
   {friability} and {brittleness}. --Locke.

Source : WordNet®

malleability
     n : the property of being physically malleable; the property of
         something that can be worked or hammered or shaped under
         pressure without breaking [syn: {plasticity}] [ant: {unmalleability}]