Plain weave: the weave of the warp and weft interwoven up and down.
Common plain fabric: plain cloth, poplin, taffeta, shavings, linen, cotton, polyester and so on.

Twill: A continuous diagonal line of tissue through the tissue point (or weft tissue point) becomes twill tissue. According to the direction of the grain, the right twill is pointed from the lower left to the upper right, and the left twill is pointed from the lower right to the upper left.
Common twill fabric: twill, khaki, denim, tweed, silk twill and so on.