Although the mod is quite simple, I was tired of explaining how to make it myself, so I updated it for 2.2.7

You can now build up to 200 Titans (the standard limit is 20 Titans), and up to 3 Colossi. After studying the “Titan” technology, it is possible to build up to 20 Titans at once, and for every 64 units of fleet capacity, another +1 Titan will be added, in total, with 640 units of fleet capacity, it will be possible to build another +10 titans, and with 1280 units, +20 Titans.

Installation: unpack the archive into a folder along the path: C:UsersDocumentsParadox InteractiveStellarisMod.