Multi-thickness blanks (MTB) enable the weight and the design of a part to be optimized
thanks to an appropriate distribution of thicknesses and/or mechanical properties. This is
usually obtained by adding a reinforcement piece onto the main part, both having been
previously cut and stamped separately. With MTB, pre-cut blanks are assembled before being
stamped together. This allows, in particular, the stamping and assembling operations to be
decreased, with a cost reduction thrown in. MTB's gather tailored blanks, already well
known and broadly used, and patchwork blanks which are nowadays mainly at a development
stage and give rise to an increasing interest due to their
potentialities.