No, you should never reuse head bolts, even old style "regular" head bolts, lol.
Head bolts need to hold quite a bit of pressure as cylinders fire, above 1,500psi.
But the real issue is the repeated heating up and cooling down over the years of use, the bolts stretch.
Metal gets fatigued with the daily expansion and contraction.
And any one old enough will remember a "regular" head bolt just failing, no overheating, although that could cause it as well, one head bolt would just break one day, usually during warmup.
The newer TTY(torque to yield) bolts handle this expansion and contraction much better, and were needed for aluminum heads in any case, but are better even with cast heads.
The TTY bolts are stretched, on purpose, when tightened to specs, when removed they do not return to normal length, so at this point they have less stretching ability.
Can you reuse heads bolts?
yes, if they are not broken, lol.
Should you reuse head bolts?
Never, not even the old "regular" head bolts, and especially not the newer TTY head bolts.
What are the chances of an old head bolt failing?
Doesn't matter, heck a new head bolt could fail, but here's the thing................
You will spend 8-14 hours replacing head gaskets, and at a minimum $150, probably more.
Is saving $40(or less) for a new set of head bolts worth it?
Your money, your time, your choice.