Hi and welcome to PSG. There are many ways to accomplish this type of effect.
One way is by using a Clipping mask.
As long as the shapes are on their own separate layers, you simply add a carbon fiber texture layer and clip it to the shape.
Here is the shape layer.......
Here is the carbon fiber texture layer above the shape layer.....
Here the carbon fiber layer is clipped to the shape layer......
How top clip.......Right click the shape layer and select 'create clipping mask' or hover your cursor between the two layers while holding down the alt/option key, you will see the cursor turn into a box with a black angled arrow pointing down, then click.