lol, here is a cheap way to defeat a titan on nonrushforest. build a wonder. I got bored of waiting so I wrote somestuff with walls, how do I take screen shots in game? gotta submit to the screen shot competition, lol.
this is the first time I tried it, so with some improvements, It could be faster. this should work for other civs as well, but not with norse because they need to fight for favor, no favor=no wonder. but maybe killing animals will do it, I might try it.