King knew Waters had had a tough semifinal the previous day against countrywoman Laura Massaro. Keeping her moving early was part of the plan.
''I knew I had to go out and make her work hard for very point and make her feel my presence on the court. I kept the pedal to the metal today, stayed focused and I'm really pleased."
Having won the first two sets, King bolted to a 4-0 lead before Waters made some progress back. The win was sealed with a backhand drive down the line.
King waved her arms and blew kisses to the crowd, which included her mother and husband, after the win.
She now gets back into doubles action tomorrow, with partner Martin Knight in the mixed doubles - looking for more success after New Delhi - and Amanda Landers Murphy.