The uniaxial drawing of PA6/tie/PE multilayer blown films is investigated in relation to the behavior of the pure components. The tensile stress strain behavior of the multilayers obeys a simple additive mixture law of the one of the components which is consistent with the parallel mechanical coupling of the layer structure of the films. No significant difference is observed in the crystallographic evolution of each layer in the multilayer films as compared with the parent monolayer films. The rupture of the multilayer films yet appears to be directly governed by the PA6 layer, as it triggers an early rupture of the PE layer without decohesion. This contrasts with the rupture behavior upon biaxial drawing that was previously shown to strongly depend on the layer thickness ratio: the thicker the PE layer, the higher the strain at break of both the PE and the PA6 layers. Besides, the strain at break of the PA6 layer in the multilayers under biaxial drawing was greater than that of neat PA6. However, a common feature to uniaxial and biaxial drawing is the similar beta-alpha strain-induced phase transformation and the same limiting value of the alpha-crystal content at rupture in the PA6 layer, for all multilayer films and the PA6 monolayer film as well. This finding supports the previously proposed rupture criterion based on flaw propagation through the crack-prone alpha-crystalline phase when this latter phase reaches a critical content for mechanical percolation. The major differences and similarities between the two drawing modes are discussed in consideration of the different state of stress that modifies the pathway of the beta-alpha phase transformation. (C) 2012 Elsevier Ltd. All rights reserved.