You only need two files if you are creating the titleblock in AutoCAD Mechanical. Then you would need a border drawing file and a title drawing file. A Vanilla AutoCAD titleblock does not need to be made of separate files.
Either way...
I suggest opening a titleblock which AutoCAD provides in the download content. Select an ANSI or ISO first! You can SAVEAS and modify to suit your needs. Attributes can be added for text which may need to change from project to project or drawing to drawing. All other text such as your company contact info should be static. You can also add .tif files for logos and merge them with your titleblock, unless you want to draw it with linework.