Final answer:
Another name for the leading tone in F-sharp minor is 'ti,' which is the seventh note of the scale and is assigned the solfège syllable that corresponds to the seventh scale degree.
Step-by-step explanation:
The term "leading tone" in F-sharp minor refers to the seventh note or degree of the scale, which is E sharp. In terms of solfège, this note is called ti. Therefore, the correct answer to what is another name for the leading tone in F-sharp minor is ti (option 2). This is because in the context of solfège, each note of a major scale is given a specific syllable, and ti is the syllable used to denote the seventh scale degree, which leads into the tonic or the first scale degree (in this case, F-sharp).