In the shader nodes, attach a Mapping node to the material maps you wish to tile, then you can adjust the scale parameter for XYZ. Alternatively, if the object is UV mapped, you could enter the UV Editing mode, select the UV islands and scale them larger or smaller. As long as your texture map is tileable, then it will repeat itself on the object as the UVs increase in size. The easiest way is just to attach a Mapping node and adjust the scale there. This gives you more control over the mapping.

______________________________________

My Store
My Free Models
My Video Tutorials
My CG Animations
Instagram: @luxxeon3d
Facebook: https://www.facebook.com/luxxeon