A gold hammer can mine everything, full stop.
I suppose a titanium hammer might do the same in less hits (on average) since gold hammers do 6 damage on a block with a chance somewhere from 25-50% to crit for double that amount. Titanium might very well do eight or twelve damage, but I wouldn't know since they cost such a stupid amount of spark from having to alloy. You do silver-steel-steel for 360 spark then gold-copper-copper for another 360, then you need TWO of each of those to alloy for ONE titanium ingot, along with ANOTHER 360 spark for a total of 1,800 spark for ONE INGOT! Of which you need 20 and another 1,440 spark to get the two refined titanium you need for a tool, along with a yet further 720 spark.
Total it all together, and a single titanium hammer will set you back a ludicrous 38,160 spark, compared to the mere 4,320 a superior gem tool will cost you. You'd have to be a lunatic at this point to use titanium ANYTHING.
Total titanium tool cost:
-80 iron. EDIT: Apparently silver alloy only takes one iron, so 40 iron instead of 80.
-all the fuel necessary to smelt the above 260 pieces of metal. EDIT: Similarly, 220 pieces of metal.
-A perverse titanium-lust induced frenzy driving you to sacrifice,