A fiber reinforced structural element comprising a thermoplastic fiber reinforced member, a non-thermoplastic fiber reinforced member, and a multi-layer woven tie layer. The thermoplastic fiber reinforced member contains at least one layer of thermoplastic fibers and the non-thermoplastic fiber reinforced member contains at least one layer of non-thermoplastic fibers. The multi-layer woven tie layer contains at least a first woven ply and a second woven ply, where the woven plies are integrated through combined portions formed by interlacing warps or wefts of adjacent woven plies. The multi-layer woven tie layer is oriented such that the upper surface of the multi-layer woven tie layer which is predominately thermoplastic fibers is adjacent the thermoplastic fiber reinforced member and the lower surface of the multi-layer woven tie layer which is predominately non-thermoplastic fibers is adjacent the non-thermoplastic fiber reinforced member.