Morphing wings have a significant impact of aircraft performance in different flight phases. The outer surface of the leading edge is subjected to large deflections leading to large stresses when considering standard materials and structures. The initial requirement of the morphing is that the additional weight of the structure, i.e. kinematic mechanism, should not prevail the benefits of the effect to the aerodynamic performance of the wing. Thus, integrating of metamaterial structures with functionallygraded characteristics is beneficial to control bending and axial stiffness while fulfilling the weight limitations.