There are many touring bikes from many manufacturers. And you don't have to have a "touring bike" to tour. In general, any road bike with eyelets/braze-ons for rear panniers can make a good tourer. So look for that. The eyelets are threaded holes down by the rear quick release. There should be braze-ons to hold the pannier forward struts on the seat stays just below where they attach to the seat tube. Dedicated touring bikes will also have braze-ons on the front forks, about half way down, to attach a set of front panniers. Most touring bikes are steel because they ride a little softer and because braze-ons work well in steel. But people also tour on titanium frames and occasionally on aluminum or carbon frames. A touring bike usually needs triple chainrings up front and a larger than normal cassette in the back. Dedicated touring bikes will also have brakes and frames with the clearance to take much larger tires than the usual road bike tires.

Just google "touring bicycles."