I wouldn't describe blues stuff as technique per se, technique seems to be more process driven - start at 50bpm and go upwards... whereas blues seems to be about getting something you think sounds right for you.

If BB bends a note and it sings and you bend the note and it chokes you go for something else to last the time after the bend,like a bend and wild vibrato or a bend and turn to get feedback or a bend and tremelo picking or bend and play a lick.

Most of the best blues sounds mimic some aspect of the human voice and most are pinned to their discoverers... so discover some more