Hi and welcome
Basically the tornado/Ego is a 510 device both are one in the same just different names, and both use the same 510 attys as your titan, so all your 510 atomisers will fit fine!
The main difference of the tornado/ego is the battery which is a lot longer lasting than the titan and is like a reverse fitting for the atty to screw into so needs an adapter to use normal chargers (male/female and all that sort of jazz if you get my meaning?)
I am not sure the 510 mega 5 battery charger will work? but looking at link below looks like it will? I would check before using to make sure though?
I do have the 10 bay one which does work, but the design of the tornado battery means that you need to use an adapter which you get with the full kit or can be bought separately again see link below!http://www.totallywicked-eliquid.com/products/tornado-e-ni-accessories/tornado-battery-mains-charger-adaptor-product.html
hope this helps and not confuses things more ha-ha! Mufftrix........