Hi ,
Is it Possible to Travel alone to UK for Tier 1 dependent when the main Visa holder is not in UK? If yes, then how long a dependent can stay alone?

Why the principle visa holder is not in UK? Is it going to be a temporary period or unknown? Are you still married? Etc. There are many facts that you left out...

Hi Thanks for your reply ,

Well I am Married, due to some Reason my wife is not willing to Travel, but she will join me after Two months.

If this is the first entry for both of you.. no. If the principle visa holder has entered UK and left for personal matters, expected to be returned.. yes.