The Collaborative International Dictionary of English v.0.48:

Malleate \Mal"le*ate\, v. t. [imp. & p. p. Malleated; p. pr. &
   vb. n. Malleating.] [L. malleatus hammered, fr. malleus a
   hammer. See Mall, v. t.]
   To hammer; to beat into a plate or leaf.
   [1913 Webster]