Muli-Scale modelling of the plastic deformation of polycrystalline materials: Elasto-plastic finite element modelling of forming processes of anisotropic materials; development of the anistropic constitutive models required for that purpose; mesoscale modelling (grain size range) of plastic deformation of polycrystalline aggregates with crystallographic texture; microscopic (range 1-10 micrometers) modelling of anistropy induced by dislocation patterning; measurement of crystallographic texture by X-ray diffraction, determination of ODF (orientation distribution function); measurement of local texture by means of automated electron backscattering diffraction on a SEM.