In a post elsewhere I found this bicycle from the 1890s with a one-piece aluminum frame:
That thing wouldn't look at all out of place parked up among the hipster fixies out front of Twenty Tap on a SoBro Saturday afternoon. Well, except for the archaic headlamp, but he'd get mondo cool points for that.
Large-scale aluminum use didn't come into play until the very tail end of the 19th Century, with the Hall–Héroult process of refining and the industrial-scale electricity production that made it possible. Just a few years before that bicycle was made, refined aluminum was more expensive than silver; using it for the capstone of the Washington Monument was an extravagance that cost like a war pension.
Think about how giddily high-tech that bike was when it came out! It would be like, oh, I don't know... walking into a store and buying a bike made from materials reserved for jet fighters and F1 cars only a few years earlier.