Ductile just means that an object (though this term is usually associated with metals) can be shaped easily. For example, with Aluminum, you can find it in so many shapes and sizes like foil or wires. This is because it does not take so much energy to make it into those shapes.
Alluminum
it is not a ductile
when you put it on fire!
Not aluminum is not magnetic.
Bauxite
Is cooper ductile
Salt is not ductile.
No, concrete is not ductile
Calcium is not ductile.
Sir Humphrey Davy
magnesium (Mg)
For example bauxite and cryolite.