If you can bend or shape a substance, especially if it's made of metal, it is ductile. If they can stretch a metal into a thin wire, scientists consider it to be ductile.
If you agree with what everyone else does or says, you too might be ductile, or easily manipulated. Some more commonly used synonyms for ductile are malleable, for both senses of the word, and pliable or flexible, for the literal sense. The word shares the same root as the word duke. If you are a duke, you probably hope your people are ductile, or easy to lead.