World number 10 Navarro, who won the WTA 250 Hobart International last year, needed just 55 minutes to lift her first WTA 500 trophy, wrapping up a dominant run in the tournament in which she didn't drop a set.
With a strong serve and powerful groundstrokes, Navarro never allowed Arango to reach a break point, while the US Open semi-finalist won 71% of points on return.
Navarro became only the fifth player this century to win a WTA final with a 6-0, 6-0 scoreline, and the first since Iga Swiatek's victory over Karolina Pliskova in the 2021 Italian Open.
Arango, who will reach a career-high singles world ranking of 80 on Monday, could not find her stride following a nearly three-hour semi-final battle against fellow qualifier Daria Saville late on Saturday.
The Colombian world number 133 reached Sunday's final on the back of an 11-match winning streak, including last week's winning run at the WTA 125 Cancun Open, but had to play three sets in each of her last three matches.