This paper presents the possibility of using computed tomography to determine displacements and stresses during controlled deformation. Tomographic examinations are most often used to assess the quality of castings, welded joints, 3D prints, and electronic systems. These non-destructive tests enable spatial imaging of even the smallest changes in the material, such as cracks, porosity, inclusions, and many other imperfections. Dedicated programs enable precise qualitative analysis, including analysis of porosity, inclusions of other materials, material division, creation of a digital twin, and other advanced options such as digital volume correlation or analysis of the state of displacements and stresses. The Digital Volume Correlation tool allows for the comparison of components in two states before and after deformation. The tests were conducted on aluminum samples. The samples were first extruded and then re-extruded in the next three stages. Single-voxel displacement tracking was used to determine the displacements and von Mises strain in the material. VG Studio software allows for visual representation of displacement and stress. The data obtained also enabled analysis of the thickness of the wall after deformation. The research results indicate that tomographic examinations and Digital Volume Correlation (DVC) assessment can be successfully used to monitor the condition of devices and structures. The scientific aim of the article is to reveal the magnitude of changes in material displacement in extruded elements and compare them with the change in the height of the extrudates. Moreover, the work aims to show changes in the wall thickness of the extrudates throughout their volume and to compare the results of CT tests with measurements using classical methods.