Against pretty much any RDW deck you'll have lost by the time you cast a Titan. I pulled ten sample hands and... it was pretty grim. Suggestions: As MrBarrelRoll said, mainly green would be an excellent idea. I.E.: swap the land distribution to 3 mountains/swamps and then 14 forests and 4 terramorphic expanse. The Sun Titan is doing nothing for you, since the only cards it can be used for here are Arrest and Birds of Paradise. Frost Titan is... mediocre. You`d probably want to remove Shatter, Mana Leak, Arrest and Cancel - swap in another 2 naturalize and 4 harrows. You then have twelve free cards left to sub in, say, 4 Fauna Shaman and eight more mana generating creatures. Eldrazi Spawn generating ones such as Nest Invader or Kozilek`s Predator are options, as are any tap-for-X sorts. That way you`ll ramp to your titans faster, have more early blocker potentials, and be able to make sure you`re pulling the _right_ lands and _right Titans.
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Agreed - I'd swap out the trinket mage for draw cards as a bare minimum - likely Diminish as well.
Koth is a great card - but if you're planning on using him you'll want to get rid of the non-mountain lands in the deck. Alternatively, you could remove him in favour of direct burn. The way it is you're going to get some disappointing draws.
I agree, it's a strange choice, as are the Teetering Peaks. Eight (not very good) buff cards for eight (extremely weak) creatures. Since the Peaks come into play tapped it can also slow down the early game. I'd reckon swapping the Peaks out for regular Mountains would be more stable. You might also want to consider swapping out the trigons in exchange for burst lightning or any other direct damage card, since they'd be more reliable in this deck.
As of this posting, you have 52 cards - making the deck illegal. Additionally, the Coat of Arms could prove a serious liability in this deck. You have hardly any Spawn generation (5 single cards), meaning that much of the time that artifact is going to be boosting your opponent significantly more than you - for instance, an Ally deck or a goblin deck would have a much greater boost out of it than you would. The mana curve is worrying as well - you have a total of four creatures in the entire deck that can be played by the end of your second turn, which can be extremely dangerous with the number of infect decks popping up lately and a serious concern for any creature deck. I'd suggest adding in three more nest invaders and predators each in order to help stabilize your early game.
As of this posting, Survival of the Fittest and Corsehatch are doubled up.
The Semblance Anvils aren't really necessary here - 20 mountains and the (as of this writing) 14 mana Myr will give you more than enough to drop whatever you can draw. You may want to consider dropping them altogether - or, if you're still worried about mana, you could replace them with Myr Resevoirs and gain the ability to revive your fallen creatures.
You know you can have the deck builder put in multiple instances of the same card? If you put them in one at a time like this, it gets real spammy for the reader.
Or an overrun, of course.
I was thinking of something startlingly similar for constructed play this morning, actually. One minor qualm - this version is, as of this posting, 56 cards. Have you considered, say, Hand of Emrakul to give yourself an alternate win condition in the event of a bad shuffle or an opponent's Leyline of Sanctity? Getting the 4 spawn required should be a cakewalk.
This is easily the tribal deck I'd most like to try playing of any I've seen this week. Looks like fun.
If you're worried about flying, you might want to consider sideboarding some Spider Umbra - it's a more permanent fix if you're going up against someone who deals with a flier heavy deck - for instance, someone dropping Vines of Vastwood on a Plague Stinger.
This deck would be extremely satisfying to play Tsabo's Decree against.
Furnace Celebration seems like an odd choice, seeing as you're only going to use it if you pull either: A.) Kuldotha Rebirth (2), B.) Oxidda Daredevil (1, and a terrible card), or C.) Panic Spellbomb (1, also not a great card). That's 1 card to support 4 in a relatively damage limited combo, considering the small number of artifacts in the deck. Wild Evocation could actually be really harmful to you. You've got a really low mana curve deck here, which is naturally extremely fast and a solid red strategy. Wild Evocation will be of great benefit to any opponents with high cost creatures or scrying abilities, but for you it will usually just be pulling up a two mana spell most of the time. You may want to consider swapping out the daredevil/wild evocation/panic spellbomb/furnace celebration to swap in some solid red commons, like lightning bolt or another two goblin gaveleers. The Myr can be safely traded for some more equipment cards to buff your creatures while maintaining Metalcraft potential, since 23 lands is plenty mana for a quick, fast deck like this.
I think you might actually have too much mana ramping here - you'll reliably have a tonne of mana, but virtually nothing to spend it all on. You may wish to consider swapping out gilded lotus/coalition relic in exchange for some colourless creatures in order to give yourself a defensive line while waiting to draw your win condition - or possibly adding in other colourless creatures to give you an alternative strategy to waiting for a lucky draw.