Hi,
I'm not sure about the torpedoe in AH but it seems a reasonable assumption they should break.
As for historical examples, during the battle with the Bismark in WW2, the Brits used Fairey Swordfish torpedo planes, the old biplane, launched from the Ark Royal. The torps had to be launched in the trough between waves to avoid them bouncing off target. Plus, as the Swordfish made their approach, the Bismark started firing its main 38cm guns into the sea directly in front of them sending huge plumes of water up and over the low flying aircraft. If a wave could knock a torpedo off target, I'm pretty sure a 38cm shell could.
Pretty amazing really, 14 planes attacked the Bismark with no loses and they scored 2 hits which effectively sealed the Bismarks fate. The Swordfish top speed was 138mph, so maybe it's the same phenomena as seen against AA in Aces High, although thats another thread.