Hey. Sorry if title is confusing. I’ve merged 2 separate audio files and upon the ending of one and beginning of the other, there’s a little “tick” or however this sound is professionally called when it switches onto the other track.
Appreciate all help.
Some suggestions:
Cut at the [u]zero-crossings[/u].
Remove any [u]DC offset[/u].
Join with a short [u]crossfade[/u] (or a longer crossfade if you wish). A crossfade usually makes a smooth transition no matter what. But, it can mess-up the timing if you’re not very-careful (because there is an overlap) and in some cases that can be a problem, especially if the audio is synchronized with video.
“tick” or however this sound is professionally called when it switches onto the other track.
“Tick” is fine. 
Hi, thank you for your response.
Excuse my ‘noobism’ but I failed all 3 suggestions. It seems none of them made any difference. Will you please help me?
With the crossfade, did you fade to silence where the tick happens? Or, you might have to mute the audio (“Generate → Silence”) right-before the fade-in or right-after the fade-out.
Is there a way to avoid the tick from happening in first place when I attempt to merge two tracks?
Is there a way to avoid the tick from happening in first place when I attempt to merge two tracks?
It depends on the “cause” or “nature” of the tick.
If it’s DC offset you can also try a high-pass filter (at around 20Hz so you can preserve the bass) before cutting. DC is zero Hz so that should remove it. But, that could create or leave a tick at the beginning of the file(s) that you’ll have to deal with. (You aren’t hearing DC, you are hearing the sudden change when the DC kicks-in or kicks-out, and that “change” isn’t DC.)