its really hard to kill. taming however is very hard. Make stone walls and make them five tall and more if you need to.then make its length and with large enough for the titanosaur to fit through then atack the titanosaur with an argy to make it follow you intothe pen. then get your frend to close up thecage behind the titanosaur. then once hes traped make a tower next to the cage out of reach from the titanosaur. then shoot the thing until its knoked out.
put your structure resistance to max. if your on a server use metal walls insted.
You can't tame this big chunk with tranq arrows, you have to use Canon balls and shoot right at his head. He will make a small animation if you hit, its easiest if you build the canons on a Quetzal of course on a Platform saddle(Lvl 97) I promise, its gonna take long, Very long.
So, if you want this... tranqs are not the way to go, you want a quetzal or brontosuarus. Make a platform saddle and build connon shooter(in my language this is what we call it) and you must shoot at its head and you need a lot of cannon balls.