measure of the capability of sheet metal to be deformed into a desired shape. Desired shape should have no splits, wrinkles, excess thinning and should retain desired shape repeatably. Measures of formability are obtained using FEA analysis and Circle Grid analysis and the forming limit diagram.

increasing the wall angle of the design improved the formability of the part by decreasing the strain in the wall

A higher tensile grade steel would decrease the formability of your design requiring a product change

using more lubrication was not a desirable way to improve the formability since it made the manufacturing operation too costly

Should not be confused with Ductility, since metals with high ductility may show highly non-uniform thinning tendencies which is not desirable in a formed part.