libgdx SpriteBatch render to texture

Is it possible to render to texture using SpriteBatch in libGdx (Java engine for Android/Desktop)? If so, how do it?

Basically I want to render everything to 320 x 240 region of 512 x 256 texture and than scale region to fit screen (in landscape mode). This way I want to eliminate artifacts which happen when I scale alpha blended textures independently. If there is any other way to remove such artifacts, please point them out :)

And is there any online documentation for libGdx?