1) Not ductile 2) Not pliable or yielding 
• (a.) Not ductile; incapable of being drawn into threads, as a metal; inelastic; tough.
In·duc'tile adjective [ Prefix in- not + ductile : confer French inductile .] Not ductile; incapable of being drawn into threads, as a metal; inelastic; tough. 
not ductile; not pliable or yielding.