Twisting of threads has a great impact on thread properties. The greater the extent of twisting is the more compact thread fibres get, which results in greater average density and reduction of thread diameter. The higher the thread twisting is the greater the break load is.

Depending on the number of folds and twisting operations, threads are divided into single, folded, one-throw, and cabled kinds. Single thread is a non-twisted or twisted thread obtained in one formation operation. Folded thread consists of two or more single threads connected without twisting. One-throw thread consists of two or more single threads twisted in one operation. Cabled thread is manufactured in one or multiple twisting operations of two or more textile threads, at least one of which is one-throw thread.

Twisting direction defines the arrangement of thread peripheral layer twists: in the case of right twisting (Z), the thread components are directed upwards left to right; in the case of left twisting (S) - upwards right to left. Twisting directions should be opposite in the first and subsequent twisting processes to ensure even and durable threads.