Cristiane Santos knows a thing or two about second chances. She’s in the middle of one right now, and she hopes it culminates with another world title. Santos (11-1) on Saturday meets Marloes Coenen (21-5) in a rematch at Invicta FC 6 – and Invicta’s featherweight title will be on the line. It will be just the second fight for “Cyborg” since returning to action after a 16-month layoff that included a suspension following a positive steroids test that led to her being stripped of her Strikeforce title. But with Invicta, where she won her first fight back from the layoff with a first-round TKO of Fiona Muxlow in April, “Cyborg” feels rejuvenated – and happy for another opportunity. Invicta FC 6 takes place Saturday at Ameristar Casino Hotel in Kansas City, Mo.