Originally Posted by
plonz
The 1991 Technium lineup appears to employ steel tubes (tube type varies by model) and cast aluminum lugs bonded together using the Technium "process".
Those bikes were built by SBDU Raleigh Nottingham and were marketed as Dynatech in Britain. The Supercourse Technium in the catalog page(s) you supplied is 6061-T8 with chrome-moly forks and stays, like 90% of Techniums. There were steel (753) Team Techniums in other years built in the U.S., but the lugs were steel, too.
Rahmen=frame
Gabel=fork, by the way.