Jewelry wire hardness is a property of the wire that identifies how easy or hard it is to bend the wire. Soft wire is very easy to bend, while hard wire is stiff, springy and harder to bend.
High quality jewelry wire (such as gold-filled and silver) can be made in a variety of hardnesses. Hard wire is the least easy to bend, and is not used for many jewelry making projects because of this. More commonly used hardnesses for jewelry-making include soft and half-hard wire. Soft jewelry wire is recommended for making rounded jewelry wire components. Half-hard wire is recommended for making angular jewelry wire components.