Hi Marco, thanks for your answer.
You actually had my same idea, using the weave texture only for half material and hiding the other half, do the opposite for the 2nd material and then join the result. My only issue is that I'm really a newbie (just started using KeyShot) and so I'm not familiar enough with the material graph to do it by myself, so if you could help me, it would be much appreciated. Besides joining the carbon fiber and anodized aluminum threads together, I also would like to keep a thin clear coat on top of the weave.