Use new lumber to make faux beams. Then really beat them to create character. Use hammers, chains, gouges, drills for nail holes, etc. Next, use paint, dry brushing and other paint techniques to make an aged look. Depending on he height of your ceilings, distressing could be dramatic or more subtle for lower ceilings.
Build some & installyou tube info. https://www.twelveonmain.com/diy-faux-beams/ more info. https://www.bowerpowerblog.com/beam-me-up-scotty/ more info. http://blog.jennasuedesign.com/2014/02/kitchen-chronicles-diy-wood-beams/ bunch more w/videos https://www.youtube.com/results?search_query=DIY+ceiling+beams or you can buy preassembled and install.
they make faux beams out of a styrofoam like material. light and easy to install. look real.
Hi, this may help, https://www.youtube.com/watch?v=GpYxxGfYLUM