Twill Weave Stainless Steel wire mesh is where two lines of the warp and weft wires are interweaved alternately. With the same wire diameter and opening size, the twill weave mesh is less firm than the plain weave mesh. This type of weave is for thick/heavier wires, or when the mesh is so fine that the weft wire cannot withstand the stress of crimping during weaving in plain weave.