title

The text that is displayed in the column header cell. If not set the field is used.

$("#grid").shieldGrid({
    dataSource: {
        data: [
            { ID: 1, name: "name1" },
            { ID: 2, name: "name2" }
        ]
    },
    columns: [
        { field: "ID", title: "Unique Number" },
        { field: "name", title : "Name" }
    ]
});

Live demo of title property you can find here: Columns Title