This paper presents a brief overview of the recent developments in equal channel angular pressing (ECAP) for manufacturing bulk ultrafine grained (including nanocrystalline) metals, being done in the authors' laboratory. The deformation behaviour and mechanical properties of equal channel angular pressed metals are investigated using numerical techniques. The properties of the ECAP processed materials are strongly dependent on the shear deformation behaviour during plastic deformation, which is controlled mainly by die geometry, material properties, and process conditions. The plastic deformation behaviour of the materials during the ECAP process with a frictionless condition was investigated using the commercial two-dimensional rigid-plastic finite element code (DEFORM2D). The inhomogeneous strain distribution within the workpiece was analysed. Due to the faster flow of the outer part compared to the inner part within the main deforming zone, the lesser shear zone in the outer part of the workpiece occurs. The prediction of the deformation inhomogeneity is compared with the experimental data. A lumped heat transfer analysis that ignores the temperature inhomogeneity of the workpiece was made in order to investigate the temperature rise of the workpiece during ECAP. As a novel process for commercial applications, equal channel multi-angular pressing (ECMAP) is analysed, focusing on the high strain generation by one pass and the deformation homogenisation of materials during the pressing.