What is the meaning of -tı?

Derives nouns from verbs, of a result or product of the action, with the suffix -n, which derives Reflexive forms of verbs.

Some verb roots either do not have Reflexive forms due to being New Turkish words derived through false analogy or these forms fell off use in modern Turkish.

Derives onomatopoeic nouns, with suffixes -ır or -ıl, which derive onomatopoeic verbs in Turkic dialects.

Derives nouns with the suffix -ar, which derives intransitive verbs from the names of colors, of an area that turns that color.

Source: wiktionary.org