Textures are a type of resource used for rendering.
Rendering with texture resources
Direct3D supports multiple texture blending through the concept of texture stages. Each texture stage contains a texture and operations that can be performed on the texture. The textures in the texture stages form the set of current textures. See Texture blending. The state of each texture is encapsulated in its texture stage.
Your application can also set the texture perspective and texture filtering states. See Texture filtering.