New developments in the hybrid material and structural concepts, like selective reinforcements of aluminium alloys and the CentrAl (Central Reinforced Aluminium alloy) concept, show the nice potential in weight saving and damage tolerance capabilities of aluminium alloys in comparison to the CFRP structures and having also available other excellent features of aluminium alloys, like impact resistant, lightning strike, reparability and maintainability. This presentation will briefly discuss the different materials, their advantages and disadvantages. The presentation will address especially the challenging features of the new CentrAl-concept in comparison to CFRP structure. It will be shown that this new concept has the potential to offer low weight primary aircraft structures and simultaneously meeting the new improved design criteria of reduced maintenance and lesser aircraft down time.