Composite manufacturers recommend a carbide circular saw blade 7-1/4 with 18 to 24 teeth. Fewer teeth stays cooler. The material is a blend of wood fiber and polyethylene with some other minor additives, that is extruded under pressure. The manufacturers use saw operations to size the extrusions and cutting is not a big problem in my experience. If you don't have a good hand-held circular saw, you might want to upgrade. I use a Skil Mag 77 worm drive with more expensive thin kerf slotted blades, and never have a problem with the saw binding or getting stuck in the work. There is no question that composite wood gets hot when cutting or drilling, but sharp carbide blades and well powered equipment will go through the work without burning or binding.
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