I assume you know the basic facts: Techniums were Raleigh's early aluminum bikes; the tubes being bonded into lugs with an industrial epoxy. I think the seatstays were steel.
Looks like your seatstays were sprayed red by a previous owner, judging from the overspray on the brake shoe.
The exact model name or number is probably under that black paint or wrapping on the top tube. If you can uncover it it'll tell you (and any Technium experts - not me!) more.
Somewhere Out There on the Interwebs there's a Raleigh history site, but I don't have it bookmarked. I believe it went into Techniums in a little more detail.
That's all I got.