Aluminium is a very rigid material it does not have the ability to flex.....hence aluminium frames giving a very harsh ride ( that why aluminium bikes are now mostly going to carbon forks and back ends. to soften the ride. It is a cheap material to Tig weld together and requires very little cleaning after welding).
Carbon forks usually have aluminium tips, which are bonded or glued into the fork blade, When in a trainer.......this can cause the glue to fail and the tip loosen or the potential for the auluminium tip itself to fracture............you cannot bend aluminium with out it 'work hardening' ( making it brittle) which can only lead to fracturing. ( thats why aluminium frames have the reputation for short life and failing)
Chrome moly viz Reynolds, Columbus, Deda, Tange are an exceptionally strong material and have the ability to flex and return to its original shape. It also has the abilty with proper tube selection to give a lively responsive ride. Chrome moly is either brazed (with bronze, silver, ) into lugs or Tig welded....however the fittings and fork ends have to be brazed into the tubing. There are different quality lugs and fork tips these have different quality's of being able to flex. So steel forks have the best qualities.
What I have done for some people is to get an old commuter 10 speed road style bike.... set up the position as the good bike fitted a good saddle and pedals......you can kick it.... sweat on it....
and curse it and will keep on doing the job, leaving your lovely road bike for rolling down the road undamaged