There are items specifically made for carrying ties in a suitcase. The one I have is hard-sided and zippered, and opens up to include up to 4 ties. The ties are held in place by elasticized bands.
Not sure where you'd find them, but I'd look in travel shops or suitcase stores.
(The idea of rolling would probably work, but I can't get the image if Dilbert's tie out of my mind.)