In the 2000s Briers was the curmudgeonly and extravagant father Hector MacDonald in the BBC television programme Monarch of the Glen (2000-05), appearing in series 1,2,3 & 7. He appeared in other programmes, see Later Career.
(mal'Ä-Ä-bÄl) Capable of being shaped by being beaten or by pressure; a property of certain metals such as gold and silver. [L. malleus, a hammer] susceptible of being beaten out into a thin plate. malleable retractor.
I think that the basic difference between the two terms is that ductility is a material's ability to deform under stress, while malleability is a material's ability to deform under pressure.