Wizard Dragon
Clown Dragon
Super Dragon
Aether Dragon
Firestorm Dragon
Helios Dragon
Golem Dragon
Anubis Dragon
Deep Dragon
Bat Dragon
True**
Forestfire is more cunning, due to the fact the he possesses the ageless intelligence of a forest creature. Even though he can fight with fire, he also can summon the powers of nature, like for example fire breath mixed with thorns. Due to his superior intelligence, he is able to set traps for the slow Titan to fall into.
I think the Titan's thick skin would be able to well resist the thorns and I just can't see the Titan Dragon roasting in fire. I think both dragons are immune to fire.
Now, you hold a valid point. The Forestfire could endlessly circle or flee from the Titan with its fast speed, but the Titan just needs one smack to damage those wings to a point where it probably couldn't fly.
Tiring its prey, yes, I can very well see Forestfire do that. Also, we are not talking about mere rose bush thorns here, these are mean fire laced sharp daggers of fossilized wood that, directed at the eyes of the Titan, would blind him.