Abstract: The morphology of melt-drawn films of copolymers of vinylidene fluoride and te-trafluoroethylene with various compositions has been investigated by TEM, IR,WAXD and DSC techniques. The melt-drawn films contain highly oriented lamellae consisted of β crystal form within the composition range investigated (tetrafluoroethylene content of 10-40mol%)The β phase is stable at higher temperatures. No phase transition has been observed during the uniaxial deformation process of the films.