Like with a DVD, there are two types of "audio" CD's. One is just the data file (probably a WAV in your case), onto a CD disc, and the other is an Audio CD (like a DVD-Video, sort of), with a specific format, CDA.
If you are just sharing the audio file, then the data CD will suffice. If you want to play the CD in a hardware CD player, you will want the Audio CD.
For the former, the data CD, once you have Exported/Shared/Published your Audio only file, you can use ImgBurn, a great, free burning utility, to write a data CD.
For the latter, an Audio CD, you will want to use a program, like iTunes, Audacity, or Adobe Audition (my personal choice, but it is not a free program - by any stretch). The CDA format is specific, so you basically need to "author" the Audio CD, like one does with Video for a DVD-Video.
In my older version of iTunes, one would just Import the WAV file (or format of choice), and let iTunes convert that. Then, create a Playlist with that file (and maybe others), and burn an Audio CD from iTunes. Not sure what the workflow is for newer versions. In Audition, it is about the same. I Open my WAV files in Audition, then publish to an Audio CD, where each song is a separate Track.