Ha!
Don't expect much response, coz I've started a couple of similar threads on here after I bought my Ciocc made with the same stuff, and got nothin. You'll get more from Google, like this (there's only a little info on each link):
http://www.bringheli.com/dedacciaialum.html
http://archive.roadbikereview.com/04/0EFAA6CC.php
I'd say, due to it's kinda chunky weight (my 58cm, non-sloping frame is 1560g) and rigidity, it's more on the durable and fatigue resistant side.
Also, as far as comparing it to modern stuff, I suspect the 'new'
Dedacciai 7003 Light Alloy is just T6 Energy re-badged, because it has the exact same specs as mention in the old Bringheli link (above), which is: "7003-T6 alloys whose breaking points easily reach 470 N/mm2, and which posses a surface hardness of 135 HV after aging and heat treatments"
http://www.dedacciai.net/eng-frame-c...-aluminium.php
Anyhoo, my Ciocc is as stiff as bricks, and my favourite race bike. I prefer it slightly over my alu Soloist