titleBorderThickness: Number

Sets the thickness of border around the Title in pixels. To display border around title, set the titleBorderThickness to a number greater than zero.

• titleBorderThickness works when border color is applied.

var  chart =  new  CanvasJS.Chart("container", {
 .
 .
 axisX:{
       title: " Axis X Title",
       titleBorderColor:"black",
       titleBorderThickness:2
 },
 .
 . 
});
chart.render();