I would say that Hyperion is a better option than Theia when facing a Titan as Oranos. Helios is also a good choice because of Vortex and the Hekagigantes and the strong siege can do plenty of damage to a Titan. Hyperion makes it a bit easier to hole in and defend than Theia IMO and then you can burst out with your own Titan.
If you have gone with Theia then make mainly Hero Contarius and Stymphalian Birds, backed up with Dryads. Delete Turma (except Heroes) if necessary to make way for the Contarius. When you hit your pop limit, upgrade as many Contarius as you can and send them at the Titan along with the Birds and the Dryads (make sure that you have both of Theia's cavalry techs researched). As you lose units, make Arci and again, when you have a few and you are at pop limit, convert as many as you can to Heroes.
With Hyperion, Satyrs do a lot of damage to Titans, Chaos can be used on the Titan's accompanying army (try and target a group of Myth Units, particularly Fire Giants). You can also keep your Heroes alive for much longer with Heroic Renewal.
Basically, there are plenty of strategies that Oranos can use to fight Titans. Experiment with the AI if you need to try out something new and then bring the strategy online when you think that you can pull it off.
Finlly, the element of surprise can be a big factor when facing a human opponent. Hitting somebody with something other than Turma raiding might completely throw the enemy and win you the game.
Just have lots of fun and good luck. Hope to be up there with you soon!
Cheers.
P.S. I've Just read the post above me. Of course, you will need Favour to fight a Titan, but as Oranos you've got line of sight on all unclaimed settlements, fast moving military units (i.e Turma ) and Sky Passages (what, Oranos use Sky Passages!! Shock! Horror! ). What excuse (other than your opponent) have you got for not laying claim to whatever Town Centre you want?I do agree with pete 100%. You need Favour; so plan for it and build it into your strategy.
[This message has been edited by Centaurus (edited 12-15-2004 @ 05:09 PM).]